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Electrical Engineering Questions and Answers March 14, 2019

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Save Let the open loop transfer function L ( s ) = ( s - 6 ) 2 + 2 5 ( s + 2 ) 2 ( s - 5 ) . Fig. 8 shows the Nyquist plot of L ( s ) . The Nyquist contour is a semicircle centered at the origin which encircles the entire right half of the complex plane in a clockwise direction. Which of the following statements about the closed - loop transfer
Save Let the open loop transfer function L ( s )

A 5 0 0 V dc generator with Ra = 0 . 5 and another 4 8 0 V generator with Ra = 0 . 4 generate together 1 0 0 KW to supply a load. Calculate the Share of the generators in KW and find the terminal Voltage. Ans: Let G 1 share m kilowatt and G 2 ( 1 0 0 - m ) Kilo Watts. I 1 = 1 0 0 0 m / Eg 1 = 2 m and I 2 = 1 0 0 0 ( 1 0 0 - m ) / 4 8 0 V = 2 0 8 .

Q 1 . In a balanced three - phase Y - system, the source has an ABC phase sequence and VAN = 1 1 0 / _ 4 5 V rms . The line and load impedances are Z 1 = R 1 + jX 1 = 0 . 7 + j 1 and Zab = Rab + jXab = 2 0 + j 3 6 , respectively. ( a ) Find the magnitude of the delta current Iab, Ibc, or Ica at the load: Tries 0 / 1 1 ( b ) Find the phase angle of

5 ) The SNR required at the detector to achieve reliable communication in a DS spread - spectrum communication system is 1 5 dB . If the interference - to - signal power at the receiver is 2 0 dB , determine the processing gain required to achieve reliable communication. ( 5 \ % )
5 ) The SNR required at the detector to achieve

Why did you do V 2 - V 2 for the KCL at node V 2 for t > 0

Question 5 ( CLO: 5 , 7 ) : [ 1 0 marks A 1 0 - h p four - pole 5 0 - H z three - phase induction motor runs at 1 1 6 0 rpm under full - load conditions. a ) What is the synchronous speed of this motor? marks ] b ) What is the rotor speed of this motor when the slip is 4 % ? marks ] c ) What is the slip of this motor if the rotor frequency is 3 Hz
Question 5 ( CLO: 5 , 7 ) : [ 1 0 marks A 1 0 - h

( Tell me what to click on logism step by step to complete this assignment ) Instructions In your final Logisim project, you will use flip flops to build a programmable up / down Base - 6 0 counter - that is a counter that counts from 1 . \ ( 0 0 , 5 9 , 5 8 , \ ldots , 0 0 , 5 9 , 5 8 , \ ldots \ ) when \ ( x = 0 \ ) and 2 . \ ( 0 0 , 0 1 , 0 2 ,
( Tell me what to click on logism step by step to

Q 1 1 ) Examine the figure below then answer the following 1 - Name this logic circuit? 2 - What is the function of this circuit? 3 - Fill the empty square If the number \ ( B = 1 1 \ ) and number \ ( A = 1 0 \ )
Q 1 1 ) Examine the figure below then answer the

Determine the low cutoff frequency.
Determine the low cutoff frequency.

P 7 . For the network shown below, v 1 ( t ) = 8 0 c o s ( 3 7 7 t ) V and v 2 ( t ) = 4 0 c o s ( 3 7 7 t ) V . Find v 0 ( t ) . ( 1 0 points ) Ans ) v O ( t ) = - 2 1 . 2 2 s i n ( 3 7 7 t ) V
P 7 . For the network shown below, v 1 ( t ) = 8

Determine the the concentration of each component at t = as a function of the initial concentration of the component and the initial concentration of limiting reactant, [ A ] 0 . ( Use the following as necessary: A , B , Y , and Z . ) [ B ] = [ B ] 0 + [ A ] 0 [ Y ] = [ Y ] 0 + [ A ] 0 [ Z ] = [ Z ] 0 + [ A ] 0

Determine the v o ( t ) for t > 0 in the circuit below:
Determine the v o ( t ) for t style=

Six signals are to be sampled each at its Nyquist rate, multiplexed and transmitted by means of TDM : S 1 ( t ) bandlimited to 4 . 8 kHz , S 2 ( t ) bandlimited to 3 . 6 kHz , S 3 ( t ) bandlimited to 2 . 4 kHz , S 4 ( t ) , S 5 ( t ) and S 6 ( t ) are bandlimited to 0 . 6 kHz , ( 2 0 M ) a . Setup a scheme for accomplishing this multiplexing

Zi is a 2 0 k resistor in series with a 0 . 1 uF capacitor. Zf is a 2 0 0 k resistor Zi is a 2 0 0 k resistor. Zf is a 2 0 k resistor in parallel with a 0 . 1 uF capacitor. Zi is a 2 0 0 k resistor in series with a 0 . 1 uF capacitor. Zf is a 2 0 k resistor Zi is a 2 0 k resistor. Zf is a 2 0 0 k resistor in parallel with a 0 . 1 uF capacitor.

a 1 2 ft long, 1 . 5 kw electrical resistance wire is made of 0 . 1 in diameter stainless steel k = 8 . 7 btu htftf . the resistance wire operates

The transmitting and receiving antennas are separated by 2 0 0 distance and have 2 0 dB and 1 6 dB directivity. If 5 mW power is received for 1 5 w transmitted power, then determine the product of transmitter and receiver efficiencies ( ( t * R ) )
The transmitting and receiving antennas are

S 7 - 1 2 0 0 q , CPUs can control a standard application and a safety application at the same time. A ) standard B ) technology C ) SIPLUS D ) failsafe
S 7 - 1 2 0 0 q , CPUs can control a standard

Problem 3 . A 1 0 0 - MVA, 1 4 . 4 - k V , 0 . 8 - P F - lagging, 5 0 - H z , two - pole, Y - connected synchronous generator has a synchronous reactance of 2 . 2 8 1 and an armature resistance of 0 . 0 2 2 8 . ( a ) What is the magnitude of the internal generated voltage E A at the rated conditions? What is its torque angle at these conditions? (
Problem 3 . A 1 0 0 - MVA, 1 4 . 4 - k V , 0 . 8

What distinguishes an SPLD ( Simple Programmable Logic Device ) from a CPLD ( Complex Programmable Logic Device ) ? A ) SPLDs are more complex and have more logic blocks than CPLDs B ) CPLDs are typically faster and have more logic gates than SPLDs C ) SPLDs are used for digital - to - analog conversions D ) CPLDs are limited to 4 - input logic

The maximum allowable current that can be safely carried by a given wire gauge is called...
The maximum allowable current that can be safely

Describe the relationship between ( i ) voltages and ( ii ) currents established at the terminals of an NPN bipolar junction transistor when it is operating in the active state?

a ) Please design an inverting amplifier with an op amp which has a gain of 1 5 . The amplifier shall have a 3 - dB frequency of 1 0 kHz ( the capacitor of the operational amplifier shall be placed in the feedback loop of the operational amplifier ) b ) If the resistors have a tolerance of + - 1 % , what will be the minimum and maximum gain of the
a ) Please design an inverting amplifier with an

Section 1 Exercise 1 . ( 1 5 points ) The bridge rectifier shown in the next Figure uses silicon diodes, the voltage Source before the bridge, and Find the DC output voltage ( V D C ) and DC output current ( I D C ) flowing through the R = 1 k W resistor. Also, calculate the DC power consumed by the load ( Resistor ) .
Section 1 Exercise 1 . ( 1 5 points ) The bridge

B = f 0 Q 7 . In problem 1 , what is the corner frequency if the load changes to 1 kHz ? R t h = 8 6 0 1 1 1 0 k 7 R + h = 8 6 0 1 1 1 K =
B = f 0 Q 7 . In problem 1 , what is the corner

For the circuit shown in the figure, find the power dissipated in the 1 0 resistor? 1 1 0 W 1 2 0 W 1 6 0 W 1 4 0 W
For the circuit shown in the figure, find the

Write IR 1 , IR 2 , IR 3 , IR 4 , IR 5 , IR 6 IS 1 and IS 2 equations and Find IR 1 , IR 2 , IR 3 , IR 4 , IR 5 , IR 6 , IS 1 and IS 2
Write IR 1 , IR 2 , IR 3 , IR 4 , IR 5 , IR 6 IS

Why was MOSFET and not the BJT the precursor of the digital era?

#T = 8 , #M = 6 , #N = 1 9 . Can someone verify my work and answer please
#T = 8 , #M = 6 , #N = 1 9 . Can someone verify

A 3 - phase, 6 - pole squirrel - cage induction motor, connected to a 6 0 Hz , possesses a synchronous speed of 1 2 0 0 r / min . The motor absorbs 4 8 kW , and the copper and iron losses in the stator amount to 6 kW and 1 . 2 kW , respectively. Calculate: ( 5 ) The power transmitted across the air gap. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ kW

2 . Give the classification of the industrial loads and draw their torque - speed characteristics.
2 . Give the classification of the industrial

The EduBase board has an LM 4 5 temperature sensor on the board, attached to AIN 8 . In this project, you must configure a periodic timer to fire every 5 seconds. For 1 second after the timer fires, LED 0 on the EduBase board should turn on . The timer s expiration should be the trigger for an analog to digital conversion. When the conversion is

Solar sail & Optical tweezers Explain the principles, estimate the feasibility
Solar sail & Optical tweezers Explain the

( 2 ) For the circuit below, use NODAL ANALYSIS to: ( a ) Find the voltage and current in Resistor 5 . ( b ) Define all needed equations and label any current / voltage needed to develop the equations.
( 2 ) For the circuit below, use NODAL ANALYSIS

In a common source stage, increasing the floating capacitor C G D will decrease the bandwidth of the circuit Select one: True False
In a common source stage, increasing the floating

* 1 6 . 1 9 The purpose of this problem is to illustrate the use of transformers for impedance matching, a technique for delivering the greatest amount of power from a given source to a given load. Suppose that an ac signal source can be represented as a Th venin equivalent with VT = 1 0 V rms and RT = 1 0 0 0 ohms. The load to be driven is a 1 0
* 1 6 . 1 9 The purpose of this problem is to

Consider a sinusoidal signal given by S ( t ) = 3 sin ( 1 0 0 0 * pi * t ) i ) Find the o / p SNR when the signal is quantized using 9 - bit PCM ii ) Also find min no of bits needed to achieve o / p SNR of at least 4 0 dB

Problem 5 A small permanent magnet DC motor drives a large inertial load whose inertia is \ ( J \ ) . There is no friction or damping in the system. The motor is driven in current mode, which means the motor torque \ ( T = K _ { T } I \ ) is directly contolled by the input. There is no friction or damping in the system. ( a ) Show that the
Problem 5 A small permanent magnet DC motor

The inverter is modulated with a sinusoidal PWM with triangular carrier. Assume R = 2 5 , L = 5 0 mH , ma = 0 . 8 and fundamental frequency output of 2 5 Hz . Question: Design the value of the frequency ratio mf to keep the THD of the output current below 2 % .

Figure 1 D: The RC circuit set up for transient response of voltage across the capacitor. Set the resistor to 1 0 k and capacitor to 1 0 0 nF . Analyze the circuit in time domain and find the governing equation of the circuit. Your analysis should be for one complete cycle of square wave ( pulse ) with a frequency of 1 0 0 Hz and amplitude from 0
Figure 1 D: The RC circuit set up for transient

I want the solution in handwriting and an explanation of the method
I want the solution in handwriting and an

Consider the following circuit. This is the kind of circuit we could solve with a Delta Y transformation, but here we will consider it using Th venin ( or Norton ) equivalents. Answer the following questions: ( a ) . If resistor R X is replaced by an open circuit ( or , alternatively, consider R X ) , what is the voltage v x ( 1 mark ) ? ( b ) .
Consider the following circuit. This is the kind

P 1 ( 2 0 points ) Draw the state diagram and the state table for an FSM that outputs a 0 when it detects three or more consecutive 1 ' s from a serial 1 - bit data stream and outputs 1 otherwise. a ) ( 1 0 points ) Using a Mealy machine b ) ( 1 0 points ) Using a Moore machine
P 1 ( 2 0 points ) Draw the state diagram and the

Task 3 - find the root locus of the following transfer functions by Matlab ( Hint : copy the root locus figures and paste all four on a word document, create a PdF from the Word file and upload here on canvas ) : H ( s ) = 5 2 s + 1 H ( s ) = 1 0 0 s 2 + 1 0 s + 1 0 0 H ( s ) = 1 0 0 0 ( s + 5 ) ( s 2 + 6 s + 2 5 ) H ( s ) = 1 0 0 0 0 ( s 2 + 4 s
Task 3 - find the root locus of the following

The switch has been in position a for a long time. All transients have died out. At t = 0 , the switch moves instantaneously to position b . a . At t = 0 ( the last instant that the switch is in position a ) , what is the current through the capacitor? b . At t = 0 ( the last instant that the switch is in position a ) , what is the voltage across

Required to design a 3 - way traffic light control system utilizing combinational logic circuits. The system should function as a standard traffic light suitable for a T - junction. - The traffic light system must effectively cycle through red, amber, and green lights. - You may incorporate a 5 5 5 timer circuit to create appropriate delays

A disc shaped parallel - plate capacitor of diameter 1 0 mm and thickness 1 mm contains a dielectric of relative permittivity 1 2 0 0 . a . Calculate the capacitance. b . When 4 0 0 V is applied across the plates calculate ( i ) the electric field in the dielectric, ( ii ) the total charge on one of the plates, ( iii ) the polarization in the
A disc shaped parallel - plate capacitor of

find the current flowing thruogh the load resistor in the circuitt below
find the current flowing thruogh the load

What is the phase relationship between I and V 1 1 ? I leads V 1 1 by 3 0 . I lags V 1 1 by 5 6 . 6 . I lags V 1 1 by 3 0 . I leads V 1 1 by 5 6 . 6 .

Determine the instantaneous value of a sine wave that has a peak value of 2 0 V , and phase angle is + 6 5 degrees. 3 . 6 V 7 . 2 V 1 8 . 1 V 1 7 . 8 V
Determine the instantaneous value of a sine wave

Compare between Enable / Disable circuit using AND gate and that using NAND gate

Describe the working and advantages of a Flight Management System ( FMS ) used in modern aircraft.

In what mode is an n - channel D - MOSFET with a positive VGS operating?

Problem 3 : A MOSFET is connected in the source - follower configuration and employed as the output stage of a cascade amplifier. It is required to provide an output resistance of 2 0 0 . If the MOSFET has k n ' = 0 . 4 m A V and is operated at V o v = 0 . 2 5 V , find the required W L ratio. Also specify the dc bias current I D . If the amplifier
Problem 3 : A MOSFET is connected in the source -

The terminals of an intersystem bonding termination are not required to be listed as grounding and bonding equipment, but they are required to be identified. Select one: True False
The terminals of an intersystem bonding

Two three phase feeders connects a generating station and a balanced load of 2 MW at 3 3 kV with 0 . 8 5 p . f . lagging. One of the feeder has resistance and reactance of 0 . 4 & 0 . 8 W respectively. It delivers 0 . 6 MW at 0 . 9 p . f . lagging. Calculate the resistance per phase of the other feeder.

1 1 . 3 - 2 Number of Modes in Resonators of Different Dimensions. Consider light of wavelength o = 1 . 0 6 m and spectral width v = 1 2 0 G H z . How many modes have frequencies within this linewidth in the following resonators ( n = 1 ) : a . A one - dimensional resonator of length d = 1 0 c m ? b . A 1 0 c m 1 0 c m two - dimensional resonator?
1 1 . 3 - 2 Number of Modes in Resonators of

Describe the subminiature micro switch

For the circuit below and \ ( \ mu = 0 . 8 \ ) , use Tellegen's theorem to determine the power absorbed by element \ ( E \ ) in the circuit below: ( Provide your calculations and reasoning for your answer. )
For the circuit below and \ ( \ mu = 0 . 8 \ ) ,

3 . Revisit the following setup from Homework 1 : Assume that the lines are lossless and have no shunt capacitances. Assume that all line reactances are x = 0 . 1 p . u . ( a ) Find the DC power flow B matrix for this system. ( b ) Assume that PNW is the reference bus ( set angle at PNW to zero ) . For the least - cost dispatch that you found for

Flexible metal conduit ( FMC ) shall be securely fastened in place by an approved means within _ _ _ _ of each box, cabinet, conduit body, or other conduit termination and shall be supported and secured at intervals not to exceed _ _ _ _ .

Problem 4 . Zo = 5 0 \ Omega system with unequal power division such that ( P _ ( 2 ) ) / ( P _ ( 3 ) ) = 8 at 3 GHz . It is specified to accept mismatch in ports 2 and 3 , but having a matched input impedance of Z _ ( 0 ) at port 1 to generator. The lengths of each line sections are suggested to be ( \ lambda _ ( g ) ) / ( 4 ) for this un - equal
Problem 4 . Zo = 5 0 \ Omega system with unequal

6 . 1 9 The power input to a 5 0 0 V 5 0 Hz , six - pole, 3 Phi squirrel case inductor motor running at 9 7 5 rpm is 4 0 kW . The stator losses are 1 kW and friction and windage losses are 2 kW . Find: i ) Slip ii ) Rotor Cu loss iii ) Brake hp
6 . 1 9 The power input to a 5 0 0 V 5 0 Hz , six

Find the power dissipated in each element in the circuit. P R 1 = P R 2 = P R 3 = P R 4 = P V 1 = P V 2 =
Find the power dissipated in each element in the

Question 6 [ 4 marks ] What is the output function Out for the following multiplexer in the standard sum of product: Please show all steps on what to do , thank you!
Question 6 [ 4 marks ] What is the output

The following differential equation models an electrical circuit where ( ) is the voltage of the interest also called state. 2 ( ) + 4 ( ) + 2 ( ) = Initial conditions: ( 0 ) = 1 , ( 0 ) = 1 a . Write your SID b . Is this circuit stable? Explain c . If stable what is the type of the system: Overdamped, under damped, critically damped, undamped d .

The difference equation of a discrete system is stated as follows: Get: y [ n ] - 3 4 y [ n - 1 ] + 1 8 y [ n - 2 ] = x [ n ] a . System transfer function ( in the Z domain ) . b . System output if x [ n ] = l u [ n ] .
The difference equation of a discrete system is

2 . For the state machine described by the following state table, with input \ ( s \ ) , output \ ( f \ ) , and JKFFs for the state elements, answer the following questions: \ begin { tabular } { | c | c | c | c | c | c | c | c | c | c | } \ hline \ multicolumn { 2 } { | c | } { Present state } & Input & \ multicolumn { 3 } { | c | } { Next state
2 . For the state machine described by the

the electric field phasor of a uniform plane wave is given by E = y ^ 1 0 e ^ j 0 . 2 z ( V / M ) . If the phase velocity of the wave is 1 . 5 x 1 0 ^ 8

B 1 . For the circuit shown in Figure B 1 , ( a ) state with reason whether the diode is reverse biased or forward biased. Support your answer with calculations. [ 6 marks ] ( b ) calculate the currents flowing through resistors R 1 and R 2 . Indicate the directions of both currents. [ 6 marks ] ( c ) calculate the current flowing through the
B 1 . For the circuit shown in Figure B 1 , ( a )

Given R = 8 , C = 7 F , and L = 7 H . Determine the type of the above filter from Vs to I C . Low - pass filter High - pass filter Band - pass filter Band - stop filter
Given R = 8 , C = 7 F , and L = 7 H . Determine

The internal resistance of a source is 2 and is connected with an external load of 1 0 . What is R t h ? In the above question if the voltage is 1 0 V and the load is of 5 0 . What is the load current and V t h ? Verify I L ? If the internal resistance of a source is 5 and is connected with an external load of 2 5 . What is R t h ? In the above
The internal resistance of a source is 2 and is

3 phase Star Unbalance Load Transfomer with Phase Voltage V phase = 4 1 5 Volts and Frequency = 6 0 Hz , Find the Line Voltges Lr , where Ly is faulted , Lb . The Impedances of its line are Zr = 2 0 ohms Zy = 1 5 ohms , Zb = 4 5 ohms , look for Neutral current In = ? and the total Power W = ? in Polar form.

Q 8 ( 0 0 1 , 0 1 0 , 1 0 1 , 1 1 1 ) and repeat as shown in the state diagram of Figure ( Q 8 ) . Use D flip - flops Figure Q 8
Q 8 ( 0 0 1 , 0 1 0 , 1 0 1 , 1 1 1 ) and repeat

A controlled single - phase full - wave bridge rectifier has an RL load with R = 2 5 and L = 5 0 mH . The source is 2 4 0 V rms at 6 0 Hz . Determine the average load current for ( a ) = 1 5 and ( b ) = 7 5

Question 4 ( i ) A Forward converter has the following parameters: - Input voltage, \ ( V _ { \ text { in } } = 3 0 \ mathrm { ~V } \ ) , - Output voltage, \ ( V _ { \ text { out } } = 3 . 3 \ mathrm { ~V } \ ) , - Output current, \ ( I _ { \ text { out } } = 1 0 \ mathrm { ~A } \ ) . - Switching frequency \ ( = 5 0 0 \ mathrm { kHz } \ ) , -
Question 4 ( i ) A Forward converter has the

Alternating Current - Vp , Vpp , Vrms ( Q 1 ) : An ac waveform has a Vpp ( Voltage Peak to Peak ) of 9 Volts . What is the Vrms ( Voltage RMS ) ? Answer in Volts. Accurate to two decimals . Do not write the unit.

Why do you think the DMM has a voltage reading that is different from the oscilloscope?
Why do you think the DMM has a voltage reading

Which of the following devices is used as a semiconductor substitute for the vacuum tube? A Punched card B Transistor Capacitor Resistor
Which of the following devices is used as a

3 . 1 0 points Plot the voltage transfer function ( \ ( \ mathrm { V } _ { \ mathrm { I } } \ ) vs . Vo ) for the circuit in Fig. 2 . Assume the voltage drop is 0 . 7 V in forward - biased condition for each diode. The turning points and slope of each segment should be indicated. ( 1 0 points ) Fig. 2
3 . 1 0 points Plot the voltage transfer function

2 . Consider the network with meters at locations as shown in Figure 1 on page 2 . The measurement values and standard deviations ( \ ( \ sigma \ ) ) of the meters are given in Table 1 on page 2 . All branch impedances are in per unit ( pu ) on a 1 0 0 MVA base. Use the DC power flow model in your calculations. Note: Question No . 2 continues on
2 . Consider the network with meters at locations

Question 3 ( 2 . 5 points ) Listen Consider a 3 - phase Y - connected source: the ratio of its phase voltages' magnitude to its line voltages' magnitude is 1 : 1 1 . 7 3 2 : 1 1 . 4 1 4 : 1 1 : 1 . 4 1 4 1 : 1 . 7 3 2
Question 3 ( 2 . 5 points ) Listen Consider a 3 -

. Discuss the following factors to be taken into consideration in the mechanical design of a transmission line. i . ii . iii. Loading on the conductors. Span, sag and tension. Clearance from the ground.

9 . The scaling factor ( G ( 0 ) ) of the transfer function is: a . 0 b . 1 / 2 c . 1 / 4 d . 2 e . 1

The logic function ( s ) used by PLCs is ( are ) :

Consider a CMOS process for which Lmin = 0 . 2 5 m , tox = 6 nm , n = 4 6 0 cm 2 / V s , and Vt = 0 . 5 V . ( a ) Find C ox and k n . ( b ) For an NMOS transistor with W / L = 2 0 m / 0 . 2 5 m , calculate the values of VOV , VGS , and VDS min needed to operate the transistor in the saturation region with a dc current I D = 0 . 5 mA . ( c ) For

4 . If X ( jw ) = ( 1 / 2 ) / jw + 1 + 1 / 2 / jw + 3 . find x ( t ) dt ?

A CE amplifier using a BJT with / J = 1 0 0 is biased at le = = I mA and has a collector resistance Re = 5 ill. Find R , 0 , R 0 , and Avo - If the amplifier is fed with a signal source having a resistance of 5 kn , and a load resistance RL = 5 k . Q is connected to the output terminal, find the resulting A . and G v If vw is to be limited to 5 mV

1 . Find the total impedance of the parallel networks of Fig. 1 in rectangular and polar form. Fig. 1 : Problem 1
1 . Find the total impedance of the parallel

Which of the following is NOT a property of high - carbon steel? High corrosion resistance Low ductility High strength High hardness A 1 2 0 V single phase residential lighting circuit has 1 1 8 light bulbs rated at 1 2 . 5 W each. If nothing else is on the circuit what is the required trip rating of the breaker? 1 2 A 1 4 A 1 5 A A 1 2 0 V single
Which of the following is NOT a property of high

WHat are the problems facing PLC implementation on home automation?

Door Security System A simple security system for two doors consists of a card reader and a keypad ( Fig . 1 ) . A person may open a particular door if he or she has a card containing the corresponding code and enters an authorized keypad code for that card. The outputs from the card reader are as follows: \ table [ [ , A , B ] , [ No card
Door Security System A simple security system for

The ripple factor in a fully controlled converter is most affected by which parameter? A ) Load resistance B ) Firing angle and load type C ) Source frequency D ) Switching frequency

Which of the following should not be used for the application on speed control of electric trains? A . Capacitor B . Variable Transformer C . Autotransformer D . All of the above E . No correct answer

A . A Ta 2 O 5 semiconductor at temperatures greater than 1 2 0 0 C has doubly - charged, oxygen vacancies. Your colleague argues strongly that these oxygen ionic defects convert the lattice into a p - type semiconductor is he correct and give your reasoning. B . Is the semiconductor n - type or p - type, if WO 3 is added to Ta 2 O 5 lattice and

7 . 1 5 Using the Step by step method , find i o ( 9 0 m s ) in the circuit in Fig. P 7 . 1 5 . Figure P 7 . 1 5
7 . 1 5 Using the Step by step method , find i o

A signal y ( t ) is obtained through the convolution between two signals x 1 ( t ) and x 2 ( t ) such that: | x 1 ( ) | = 0 for | | > 1 0 0 0 | x 2 ( ) | = 0 for | | > 1 5 0 0 Calculate the sampling period T s for the sampled signa y s ( t ) to be reconstructed to its original signal y ( t ) .
A signal y ( t ) is obtained through the

A . 4 Find a way to make an AND gate using only NOR gates. Make a truth table showing that your combination of gates will work. Also, draw a schematic of the circuit. Is the NOR a "universal" gate?
A . 4 Find a way to make an AND gate using only

How to solve 3 . 6 . 1 1 In the network in Fig. P 3 . 6 . 1 1 , find the value of R L for maximum power transfer. In addition, calculate the maximum power dissipated in R L under these conditions.
How to solve 3 . 6 . 1 1 In the network in Fig. P

Design and sketch an order N = 3 stepped impedance Chebyshev 0 . 5 dB low pass filter for a 5 0 system where the highest practical line impedance is Z h = 1 7 5 and the lowest is Z l = 1 0 . Use the low pass prototype that begins with a series inductor and specify the required section electrical lengths l .
Design and sketch an order N = 3 stepped

A 2 2 0 V , 5 0 0 A , 6 0 0 rpm separately excited DC motor has armature and field resistance of 0 . 0 2 0 hm and 1 0 ohm respectively. The load torque is expressed as: TL = 2 0 0 0 - 2 N , where N is the motor speed in rpm . Calculate the motor terminal voltage and armature current ( a ) For motor speed of 4 5 0 rpm . ( b ) For motor speed of 7 5

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