Physics of Everyday Phenomena A conceptual Introduction to physics 6th edition W. Thomas Griffith, Juliet W. Brosing - Solutions

A 30-Ω resistor has a voltage difference of 3 V across its leads.a. What is the current through the resistor?b. What is the power being dissipated in this resistor?
A 9-V battery in a simple circuit produces a current of 1.5 A through the circuit. How much power is being delivered by the battery?
Three identical resistances, each 24 Ω, are connected in parallel with one another as shown. The combination is connected to a 12-V battery whose internal resistance is negligible.a. What is the equivalent resistance of this parallel combination?b. What is the total current through the
Three resistors of 3 Ω, 6 Ω, and 2 Ω are connected in parallel with one another. What is the equivalent resistance of this combination?
Two resistors, each having a resistance of 8 Ω, are connected in parallel. What is the equivalent resistance of this combination?
Three resistors are connected to a 6-V battery as shown. The internal resistance of the battery is negligible.a. What is the current through the 15-Ω resistance?b. Does this same current flow through the 25-Ωresistance?c. What is the voltage difference across the 20-Ω resistance? 15 2 20 2 25 2
In the circuit shown, the 1-Ω resistance is the internal resistance of the battery and can be considered to be in series, as shown, with the battery and the 9-Ω load.a. What is the current flowing through the 9-Ω resistor?b. What is the voltage difference across the 9-Ω resistor? 3 V 15 E8
A 40-Ω resistor and a 60-Ω resistor are connected in series to a 12-V battery.a. What is the current flowing through each resistor?b. What is the voltage difference across each resistor?
Three 20-Ω resistors are connected in series to a 6-V battery of negligible internal resistance.a. What is the current flowing through each resistor?b. What is the voltage difference across each resistor?
A current of 0.6 A flows through a resistor with a voltage difference of 120 V across it. What is the resistance of this resistor?
A current of 1.5 A is flowing through a resistance of 18 Ω. What is the voltage difference across this resistance?
A 24- resistor in a circuit has a voltage difference of 6 V across its leads. What is the current through this resistor?
A current of 2.5 A flows through a battery for 1 min. How much charge passes through the battery in that time?
A charge of 30 C passes at a steady rate through a resistor in a time of 5s. What is the current through the resistor?
How does a bimetallic strip break a circuit when things heat up? Explain.
Suppose that the appliances connected to a household circuit were connected in series rather than in parallel. What disadvantages would there be to this arrangement? Explain.
Would it make sense to connect a fuse or circuit breaker in parallel with other elements in a circuit? Explain.
Which of these appliances is most likely to cause an overload problem when connected to a circuit that already has other appliances drawing current from it: an electric shaver, a coffeemaker, or a television set? Explain.
In using a dc voltmeter, it is important to connect the positive terminal of the meter in the correct direction in the circuit relative to the positive terminal of the battery. Is this likely to be true for the use of an ac voltmeter? Explain.
Does a battery connected to an electric motor represent a perpetual-motion machine? Explain.
What energy source increases the potential energy of the water behind the dam of a hydroelectric power plant? Explain.
Does the power being delivered by a battery depend on the resistance of the circuit connected to the battery? Explain.
If the current through a certain resistance is doubled, does the power dissipated in that resistor also double? Explain.
Is electric energy the same as electric power? Explain.
Which will normally have the larger resistance, a voltmeter or an ammeter? Explain.
In the circuit shown, the circle with an A in it represents an ammeter. Which of these statements is correct? Comment on each.a. The meter is in the correct position for measuring the current through R.b. No current will flow through the meter, so it will have no effect.c. The meter will draw a
In the circuit shown, the circle with a V in it represents a voltmeter. Which of the following statements is correct? Explain.a. The voltmeter is in the correct position for measuring the voltage difference across R.b. No current will flow through the meter, so it will have no effect.c. The meter
When current passes through a series combination of resistors, does the current get smaller as it goes through each successive resistor in the combination? Explain.
If we disconnect R2 from the rest of the circuit shown in the diagram for question 14, will the current through R3 increase, decrease, or remain the same? Explain. R2 R2 R3
In the circuit shown in question 14, which of the three resistors, if any, has the largest voltage difference across it? Explain. R2 R3
In the circuit shown below, R1, R2, and R3 are three resistors of different values. R3 is greater than R2, and R2 is greater than R1. ε is the electromotive force of the battery whose internal resistance is negligible. Which of the three resistors has the greatest current flowing through it?
Two resistors are connected in series with a battery as shown in the diagram. R1 is less than R2.a. Which of the two resistors, if either, has the greater current flowing through it? Explain.b. Which of the two resistors, if either, has the greatest voltage difference across it? Explain. R Q13
When a battery is being used in a circuit, will the voltage across its terminals be less than that measured when there is no current being drawn from the battery? Explain.
A dead battery will still indicate a voltage when a good voltmeter is connected across the terminals. Can the battery still be used to light a light bulb? Explain.
If we decrease the potential difference across a resistance in a circuit, will the current flowing through that resistance increase, remain the same, or decrease? Explain.
Consider the two signs shown, located in different physics labs. Which of the two would be reason for greater caution? Explain. Danger! 100,000 0 Danger! 10,000 V Q9 Diagram
Suppose that we use an uncoated metal clamp to hold the wires in place in the battery-and-bulb circuit shown. Will this be effective in keeping the bulb burning brightly? Explain. 1.5 V Q8 Diagram
Two circuit diagrams are shown. Which one, if either, will cause the light bulb to light? Explain your analysis of each case. 1.5 V (a) Q7 Diagram 1.5 V (b) Open switch
Consider the circuit shown. Could we increase the brightness of the bulb by connecting a wire between points A and B? Explain. A B Q6 Diagram
Consider the circuit shown, where the wires are connected to either side of a wooden block as well as to the light bulb. Will the bulb light in this arrangement? Explain. 1.5 V Wood block Q5 Diagram
Are electric current and electric charge the same thing? Explain.
In a simple battery-and-bulb circuit, is the electric current that enters the bulb on the side nearer to the positive terminal of the battery larger than the current that leaves the bulb on the opposite side? Explain.
Suppose that you have two wires, a battery, and a bulb. One of the wires is already in place in each of the arrangements shown in the next column. Indicate with a drawing where you would place the second wire to get the bulb to light. Explain your decision in each case. 1.5 V 1.5 V (a) (b) Q2
Two arrangements of a battery, bulb, and wire are shown below. Which of the two arrangements, if either, will light the bulb? Explain. 1.5 V 1.5 (a) (b) Q1 Diagram
Suppose that the top plate of a parallel-plate capacitor has an electric potential of 0 V and the bottom plate has a potential of 400 V. There is a distance of 1.2 cm between the plates.a. What is the change in potential energy of a charge of 3 x 10-4 C that is moved from the bottom plate to the
Suppose that four equal positive charges are located at the corners of a square, as in the diagram.a. Using small arrows, indicate the direction of the electric field at each of the labeled points.b. Would the magnitude of the electric field be equal to zero at any of the labeled points?
Suppose that one of the two charges in synthesis problem 2 is twice as large as the other one. Use the procedures suggested in parts a and b of synthesis problem 2 for this new situation. (When sketching the field, there should now be twice as many field lines emerging from the larger charge as
Suppose that two equal positive charges lie near one another, as shown in the diagram.a. Using small arrows, indicate the direction of the electric field at the labeled points on the diagram. Think about the direction of the force that would be exerted on a positive charge placed at each of these
Three positive charges are located along a line, as in the diagram. The 0.10-C charge at point A is 2 m to the left of the 0.02-C charge at point B, and the 0.04-C charge at point C is 1 m to the right of point B.a. What is the magnitude of the force exerted on the 0.02-C charge by the 0.10-C
Four coulombs of positive charge flow from the +6 V positive terminal of a battery to the negative terminal at 0 V. What is the change in potential energy of the charge?
A charge of +0.25 C is moved from a position where the electric potential is 10 V to a position where the electric potential is 60 V. What is the change in potential energy of the charge associated with this change in position?
A charge of -3 x10-6 C is placed at a point in space where the electric field is directed toward the right and has a magnitude of 8.5 x 104 N/C. What are the magnitude and direction of the electrostatic force on this charge?
A +1.5 x 10-6 C test charge experiences forces from two other nearby charges: a 12-N force due east and an 8-N force due west. What are the magnitude and direction of the electric field at the location of the test charge?
A test charge of -4 x 10-6 C experiences a downward electrostatic force of 12 N when placed at a certain point in space. What are the magnitude and direction of the electric field at this point?
A uniform electric field is directed upward and has a magnitude of 20 N/C. What are the magnitude and direction of the force on a charge of -5 C placed in this field?
An electron and a proton have charges of an equal magnitude but opposite sign of 1.6 x 10-19 C. If the electron and proton in a hydrogen atom are separated by a distance of 5 x 10-11 m, what are the magnitude and direction of the electrostatic force exerted on the electron by the proton?
A charge of +2 x 10-6 C is located 20 cm from a charge of -4 x 10-6 C.a. What is the magnitude of the force exerted on each charge?b. On a drawing, indicate the directions of the forces acting on each charge.
Two positive charges, each of magnitude 4 x 106 C, are located a distance of 10 cm from each other.a. What is the magnitude of the force exerted on each charge?b. On a drawing, indicate the directions of the forces acting on each charge.
Two charged particles exert an electrostatic force of 27 N on each other. What will the magnitude of the force be if the distance between the two particles is increased to three times the original distance?
Two charged particles exert an electrostatic force of 8 N on each other. What will the magnitude of the electrostatic force be if the distance between the two charges is reduced to one-half of the original distance?
Two identical steel balls mounted on wooden posts initially have different amounts of charge, one +12 μC, and the other -4 μC. The balls are allowed to touch and then are separated again. What is the final charge on each ball?
Two identical brass balls mounted on wooden posts initially have different amounts of charge, one +3 μC and the other +15 μC. The balls are allowed to touch and then are separated again. What is the final charge on each ball?
An electron has a charge of - 1.6 x 10-19 C. How many electrons would be needed to produce a net charge of -4.8 x 10-6 C?
Would you be more likely to be struck by lightning if you stood on a platform made from a good electrical insulator than if you stood on the ground? Explain.
Will a negatively charged particle, initially at rest in an electric field, tend to move toward a region of lower electric potential if released? Explain.
In the drawing for question 20, which point, B or C, will have the higher electric potential? Explain. -q A B D Q20 Diagram
Is electric potential the same as electric potential energy? Explain.
Does the electric potential increase or decrease as we move toward a negative charge? Explain.
If a negative charge is moved in the same direction as the electric field lines in some region of space, does the potential energy of the negative charge increase or decrease? Explain.
If we move a negative charge toward a second negative charge, does the potential energy of the first charge increase or decrease? Explain.
If we move a positive charge toward a negative charge, does the potential energy of the positive charge increase or decrease? Explain.
Is the electric field produced by a single positive charge a uniform field? Explain.
Three equal positive charges are located at the corners of a square, as in the diagram. Using arrows, indicate the direction of the electric field at points A and B on the diagram. 9(+ Q23 Diagram
If we change the negative charge in the diagram for question 20 to a positive charge of the same magnitude, what are the directions of the electric field at points A, B, C, and D? (Indicate with arrows.)Diagram from Question 20 -- A B D Q20 Diagram
Is it possible for an electric field to exist at some point in space at which there is no charge? Explain.
Two charges, of equal magnitude but opposite sign, lie along a line as shown in the diagram. Using arrows, indicate the directions of the electric field at points A, B, C, and D shown on the diagram. Q20 Diagram
Can both the electrostatic force and the gravitational force be either attractive or repulsive? Explain.
If two charges are both doubled in magnitude without changing the distance between them, will the force that one charge exerts on the other also be doubled? Explain.
If the distance between two charged objects is doubled, will the electrostatic force that one object exerts on the other be cut in half? Explain.
If you had several identical metal balls mounted on insulating stands, explain how you could obtain a quantity of charge on one ball that is four times as large as the quantity on another ball.
Is the concept of torque involved in the operation of Coulomb’s torsion balance? Explain.
Why are pith balls initially attracted to a charged rod and later repelled by the same rod, even though they have not touched any other charged object? Explain.
Will bits of paper be attracted to a charged rod even if they have no net charge? Explain.
If, when charging by induction, you remove the charged rod from the vicinity of the metal ball before moving your finger from the ball, what will happen? Will the ball end up being charged? Explain.
When a metal ball is charged by induction using a negatively charged plastic rod, what is the sign on the charge acquired by the ball? Explain.
If you touch the ball of a charged electroscope with your finger, will it discharge? What does this suggest about the conducting properties of people? Explain.
If you touch the metal ball of a charged electroscope with an uncharged glass rod held in your hand, will the electroscope discharge completely? Explain.
Describe how Benjamin Franklin’s single-fluid model can explain what happens when we charge a glass rod by rubbing it with a nylon cloth. How do we get two types of charge from a single fluid? Explain.
When you comb your hair with a plastic comb, what will the sign be on the charge acquired by the comb? Explain. (Compare this process to rubbing a plastic rod with cat fur.)
If you charge an electroscope with a plastic rod that has been rubbed with cat fur, will the metal leaves of the electroscope move farther apart or come closer together when you bring the cat fur near the ball of the electroscope? Explain.
Do the two metal-foil leaves of an electroscope gain charges of opposite sign when the electroscope is charged? Explain.
Two pith balls are charged by touching one to a glass rod that has been rubbed with a nylon cloth and the other to the cloth itself.a. What sign will the charge on each pith ball have? Explain.b. Will the two pith balls attract or repel one another? Explain.
When a glass rod is rubbed by a nylon cloth, which of these two objects gains electrons? Explain.
Two pith balls are both charged by contact with a plastic rod that has been rubbed by cat fur.a. What sign will the charges on the pith balls have? Explain.b. Will the two pith balls attract or repel one another? Explain.
When two different materials are rubbed together, do the two materials acquire the same type of charge or different types of charge? Explain how you could justify your answer with a simple experiment.
Suppose that an oil-fired power plant is designed to produce 100 MW (megawatts) of electrical power. The turbine operates between temperatures of 650°C and 240°C and has an efficiency that is 80% of the ideal Carnot efficiency for these temperatures.a. What is the Carnot efficiency for these
In section 11.3, we showed that a violation of the Clausius statement of the second law of thermodynamics is a violation of the Kelvin statement. Develop an argument to show that the reverse is also true: a violation of the Kelvin statement is a violation of the Clausius statement.
A Carnot engine operating in reverse as a heat pump moves heat from a cold reservoir at 5°C to a warmer one at 25°C.a. What is the efficiency of a Carnot engine operating between these two temperatures?b. If the Carnot heat pump releases 200 J of heat into the higher-temperature reservoir in each
Suppose that a certain Carnot engine operates between the temperatures of 500°C and 150°C and produces 30 J of work in each complete cycle.a. What is the efficiency of this engine?b. How much heat does it take in from the 450°C reservoir in each cycle?c. How much heat is released to the 150°C
Suppose that a typical automobile engine operates at an efficiency of 25%. One gallon of gasoline releases approximately 150 MJ of heat when it is burned. (A megajoule, MJ, is a million joules.)a. Of the energy available in a gallon of gas, how much energy can be used to do useful work in moving

Showing 500 - 600 of 1157

Physics of Everyday Phenomena A conceptual Introduction to physics 6th edition W. Thomas Griffith, Juliet W. Brosing - Solutions

Step by Step Answers