PHYSICS $241/261$ LABORATORY PRACTICAL EXAM, $45$ minutes

There are $5$ tasks listed below. After you have completed a task, write your answer in the space provided and raise your hand

to have the TA check your result. Alternatively, if you have decided that you cannot setup the circuit, you may raise your

hand and ask the TA to do the setup for you. You will receive one of the following grades after you have raised your hand.

$*0$ points: You were unable to perform any aspect $($setup or measurement$)$ of the task. $*6$

points: You were able to setup the

equipment, but got the wrong answer, OR$,$ you asked the TA to setup the equipment and you made the measurement and got the

correct answer. You may ask to have your setup graded and corrected before taking the measurement. If unit is incorrect you

will get only $3$ out of $6,$ even if the number is correct. $*12$

points: You setup the equipment correctly and arrived at the right

answer. If unit is incorrect you will get only $9$ out of $12,$ even if the number is correct but a bad measurement with correct units

is a ZERO.

Equipment: DMM$,$ Oscilloscope, DC power supply, Function generator, Lead wires, and the Test box as a number of labeled

plugs. There is one $1000$ resistor $($R$3).$ Unknowns include $2$ resistor $($ R$1$ & R$2),$ a capacitor, C$,$ and an inductor, L$.$ Between

plugs A & C is an unknown voltage. Between plugs B & C is a square wave with an unknown frequency.

Tasks:

$1.$ Put unknown resistors R$1$ and R$2$ in series. Place this combination in parallel with

resistor R$3.$ Use the DMM as an Ohmmeter to measure the equivalent resistance of the

circuit. $[$Setup Excludes wiring to meter$]$

$2.$ Use THE CURSOR FUNCTION ON the oscilloscope to determine the frequency of

the square wave between terminals B and C of the test box. $($Press and hold down the

button on the box to activate.$)$

$[$Setup Includes wiring to Oscilloscope$]$

$3.$ Construct the circuit at the right. Set the output of

the DC power supply to $6$ volts. $($Set using the DMM$)$

Determine the resistance of R$2$ by a SINGLE

additional voltage measurement. Do not make the

measurement using the DMM as an Ohmmeter or an

Ammeter! $[$Setup Excludes wiring to meter$]$

SHOW your calculations here:

$4.$ Use the digital multimeter to measure the potential difference between terminals A

and C on the test box. $($Press and hold down the button on the box to activate.$)$

$[$Setup Includes wiring to meter$]$

$5.$ Measure the inductance of the inductor in the test box. Use the test box, the function

generator and the oscilloscope. $[$Setup Excludes wiring to scope$]$

SHOW your calculations here:

Measured

Value

$\_\_\_\_\_\_\_\_$

$\_\_\_\_\_\_\_\_$

$\_\_\_\_\_\_\_\_$

$\_\_\_\_\_\_\_\_$

$\_\_\_\_\_\_\_\_$

TOTAL

$$

Score

$\_\_\_\_\_\_\_$

$\_\_\_\_\_\_\_$

$\_\_\_\_\_\_\_$

$\_\_\_\_\_\_\_$

$\_\_\_\_\_\_\_$

$\_\_\_\_$