Question 1

A multiloop circuit is shown in the figure. Some circuit quantities are not labeled. It is not necessary to solve the entire circuit. The current I1 is closest to

Accepted Answer

A)  zero. 
B)  +0.2 A. 
C)  +0.4 A. 
D)  -0.2 A. 
E)  -0.4 A. 
A)  zero. 
B)  +0.2 A. 
C)  +0.4 A. 
D)  -0.2 A. 
E)  -0.4 A. B

Question 2

The power rating of a 400-Ω resistor is 0.800 W.
(a) What is the maximum voltage that can be applied across this resistor without damaging it?
(b) What is the maximum current this resistor can draw without damaging it?

Accepted Answer

(a) 17.9 V (b) 44.7 mA

Question 3

For the circuit shown in the figure, determine the current in
(a) the 1.0-Ω resistor.
(b) the 3.0-Ω resistor.
(c) the 4.0-Ω resistor.

Accepted Answer

(a) 2.8 A (b) 1.2 A (c) 0.90 A

Question 4

In the circuit shown in the figure, all the lightbulbs are identical. Which of the following is the correct ranking of the brightness of the bulbs?

Accepted Answer

A)  B and C have equal brightness, and A is the dimmest. 
B)  A and B have equal brightness, and C is the dimmest. 
C)  A is brightest, C is dimmest, and B is in between. 
D)  A is the brightest, and B and C have equal brightness but less than A. 
E)  All three bulbs have the same brightness. 
A)  B and C have equal brightness, and A is the dimmest. 
B)  A and B have equal brightness, and C is the dimmest. 
C)  A is brightest, C is dimmest, and B is in between. 
D)  A is the brightest, and B and C have equal brightness but less than A. 
E)  All three bulbs have the same brightness.

Question 5

A 1500-W heater is connected to a 120-V line. How much heat energy does it produce in 2.0 hours?

Accepted Answer

A)  1.5 kJ 
B)  3.0 kJ 
C)  0.18 MJ 
D)  11 MJ 
E)  18 MJ 
A)  1.5 kJ 
B)  3.0 kJ 
C)  0.18 MJ 
D)  11 MJ 
E)  18 MJ

Question 6

A light bulb is connected to a 110-V source. What is the resistance of this bulb if it is a 100-W bulb?

Accepted Answer

A)  100 Ω 
B)  8.0 mΩ 
C)  6.0 mΩ 
D)  120 Ω 
E)  240 Ω 
A)  100 Ω 
B)  8.0 mΩ 
C)  6.0 mΩ 
D)  120 Ω 
E)  240 Ω

Question 7

When a 20.0-ohm resistor is connected across the terminals of a 12.0-V battery, the voltage across the terminals of the battery falls by 0.300 V. What is the internal resistance of this battery?

Accepted Answer

A)  3.60 Ω 
B)  1.56 Ω 
C)  0.98 Ω 
D)  0.30 Ω 
E)  0.51 Ω 
A)  3.60 Ω 
B)  1.56 Ω 
C)  0.98 Ω 
D)  0.30 Ω 
E)  0.51 Ω

Question 8

In the circuit shown in the figure, two 360.0-Ω resistors are connected in series with an ideal source of emf. A voltmeter with internal resistance of 6350 Ω is connected across one of the resistors and reads 3.23 V. Find the emf of the source.

Accepted Answer

The answer of In the circuit shown in the figure,...

Question 9

The voltage and power ratings of a particular light bulb, which are its normal operating values, are 110 V and 60 W. Assume the resistance of the filament of the bulb is constant and is independent of operating conditions. If the light bulb is operated at a reduced voltage and the power drawn by the bulb is 36 W, what is the operating voltage of the bulb?

Accepted Answer

A)  66 V 
B)  72 V 
C)  78 V 
D)  85 V 
E)  90 V 
A)  66 V 
B)  72 V 
C)  78 V 
D)  85 V 
E)  90 V

Question 10

A galvanometer has an internal resistance of 100 Ω and deflects full-scale at 2.00 mA. What size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 mA, and how should this resistor be connected to the galvanometer?

Accepted Answer

A)  50.0 Ω in series with the galvanometer 
B)  50.0 Ω in parallel with the galvanometer 
C)  75.0 Ω in parallel with the galvanometer 
D)  100 Ω in series with the galvanometer 
E)  100 Ω in parallel with the galvanometer 
A)  50.0 Ω in series with the galvanometer 
B)  50.0 Ω in parallel with the galvanometer 
C)  75.0 Ω in parallel with the galvanometer 
D)  100 Ω in series with the galvanometer 
E)  100 Ω in parallel with the galvanometer

Question 11

What is the maximum current that can be drawn from a 1.50-V battery with an internal resistance of 0.30 ohm?

Accepted Answer

A)  2.5 A 
B)  5.0 A 
C)  0.45 A 
D)  0.20 A 
E)  4.5 A 
A)  2.5 A 
B)  5.0 A 
C)  0.45 A 
D)  0.20 A 
E)  4.5 A

Question 12

For the circuit shown in the figure, the switch S is initially open and the capacitor voltage is 80 V. The switch is then closed at time t = 0. What is the charge on the capacitor when the current in the circuit is 33 μA?

Accepted Answer

A)  1100 µC 
B)  1000 µC 
C)  960 µC 
D)  890 µC 
E)  830 µC 
A)  1100 µC 
B)  1000 µC 
C)  960 µC 
D)  890 µC 
E)  830 µC

Question 13

The emf and the internal resistance of a battery are as shown in the figure. If a current of 8.3 A is drawn from the battery when a resistor R is connected across the terminals ab of the battery, what is the power dissipated by the resistor R?

Accepted Answer

A)  440 W 
B)  700 W 
C)  620 W 
D)  530 W 
E)  790 W 
A)  440 W 
B)  700 W 
C)  620 W 
D)  530 W 
E)  790 W

Question 14

A multiloop circuit is shown in the figure. It is not necessary to solve the entire circuit. The current I2 is closest to

Accepted Answer

A)  -6 A. 
B)  6 A. 
C)  8 A. 
D)  -8 A. 
E)  zero. 
A)  -6 A. 
B)  6 A. 
C)  8 A. 
D)  -8 A. 
E)  zero.

Question 15

Thirteen resistors are connected across points A and B as shown in the figure. If all the resistors are accurate to 2 significant figures, what is the equivalent resistance between points A and B?

Accepted Answer

A)  4.0 Ω 
B)  6.0 Ω 
C)  8.0 Ω 
D)  10 Ω 
E)  12 Ω 
A)  4.0 Ω 
B)  6.0 Ω 
C)  8.0 Ω 
D)  10 Ω 
E)  12 Ω

Question 16

For the circuit shown in the figure, I = 0.50 A and R = 12 Ω. What is the value of the emf ε?

Accepted Answer

A)  18 V 
B)  24 V 
C)  6.0 V 
D)  12 V 
E)  48 V 
A)  18 V 
B)  24 V 
C)  6.0 V 
D)  12 V 
E)  48 V

Question 17

A galvanometer has a coil with a resistance of 24.0 Ω, and a current of 180 μA causes it to deflect full scale. If this galvanometer is to be used to construct an ammeter that can read up to 10.0 A, what shunt resistor is required?

Accepted Answer

A)  123 µΩ 
B)  234 µΩ 
C)  342 µΩ 
D)  432 µΩ 
E)  423 µΩ 
A)  123 µΩ 
B)  234 µΩ 
C)  342 µΩ 
D)  432 µΩ 
E)  423 µΩ

Question 18

A 4.00-Ω resistor, an 8.00-Ω resistor, and a 24.0-Ω resistor are connected together.
(a) What is the maximum resistance that can be produced using all three resistors?
(b) What is the minimum resistance that can be produced using all three resistors?
(c) How would you connect these three resistors to obtain a resistance of 10.0 Ω?
(d) How would you connect these three resistors to obtain a resistance of 8.00 Ω?

Accepted Answer

(a) 36.0 Ω (b) 2.40 Ω
(c) Connect the 8.

Question 19

A multiloop circuit is shown in the figure. Some circuit quantities are not labeled. It is not necessary to solve the entire circuit. The current I2 is closest to

Accepted Answer

A)  +0.1 A. 
B)  +0.3 A. 
C)  +0.5 A. 
D)  -0.1 A. 
E)  -0.3 A. 
A)  +0.1 A. 
B)  +0.3 A. 
C)  +0.5 A. 
D)  -0.1 A. 
E)  -0.3 A.

Question 20

An uncharged 30.0-µF capacitor is connected in series with a 25.0-Ω resistor, a DC battery, and an open switch. The battery has an internal resistance of 10.0 Ω and the open-circuit voltage across its terminals is 50.0 V. The leads have no appreciable resistance. At time t = 0, the switch is suddenly closed.
(a) What is the maximum current through the 25.0-Ω resistor and when does it occur (immediately after closing the switch or after the switch has been closed for a long time)?
(b) What is the maximum charge that the capacitor receives?
(c) When the current in the circuit is 0.850 A, how much charge is on the plates of the capacitor?

Accepted Answer

(a) 1.43 A, immediat

Exam 28: Fundamentals of Circuits

A multiloop circuit is shown in the figure. Some circuit quantities are not labeled. It is not necessary to solve the entire circuit. The current I1 is closest to

The power rating of a 400-Ω resistor is 0.800 W. (a) What is the maximum voltage that can be applied across this resistor without damaging it? (b) What is the maximum current this resistor can draw without damaging it?

For the circuit shown in the figure, determine the current in (a) the 1.0-Ω resistor. (b) the 3.0-Ω resistor. (c) the 4.0-Ω resistor.

In the circuit shown in the figure, all the lightbulbs are identical. Which of the following is the correct ranking of the brightness of the bulbs?

A 1500-W heater is connected to a 120-V line. How much heat energy does it produce in 2.0 hours?

A light bulb is connected to a 110-V source. What is the resistance of this bulb if it is a 100-W bulb?

When a 20.0-ohm resistor is connected across the terminals of a 12.0-V battery, the voltage across the terminals of the battery falls by 0.300 V. What is the internal resistance of this battery?

In the circuit shown in the figure, two 360.0-Ω resistors are connected in series with an ideal source of emf. A voltmeter with internal resistance of 6350 Ω is connected across one of the resistors and reads 3.23 V. Find the emf of the source.

A galvanometer has an internal resistance of 100 Ω and deflects full-scale at 2.00 mA. What size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 mA, and how should this resistor be connected to the galvanometer?

What is the maximum current that can be drawn from a 1.50-V battery with an internal resistance of 0.30 ohm?

For the circuit shown in the figure, the switch S is initially open and the capacitor voltage is 80 V. The switch is then closed at time t = 0. What is the charge on the capacitor when the current in the circuit is 33 μA?

The emf and the internal resistance of a battery are as shown in the figure. If a current of 8.3 A is drawn from the battery when a resistor R is connected across the terminals ab of the battery, what is the power dissipated by the resistor R?

A multiloop circuit is shown in the figure. It is not necessary to solve the entire circuit. The current I2 is closest to

Thirteen resistors are connected across points A and B as shown in the figure. If all the resistors are accurate to 2 significant figures, what is the equivalent resistance between points A and B?

For the circuit shown in the figure, I = 0.50 A and R = 12 Ω. What is the value of the emf ε?

A galvanometer has a coil with a resistance of 24.0 Ω, and a current of 180 μA causes it to deflect full scale. If this galvanometer is to be used to construct an ammeter that can read up to 10.0 A, what shunt resistor is required?

A multiloop circuit is shown in the figure. Some circuit quantities are not labeled. It is not necessary to solve the entire circuit. The current I2 is closest to

Concepts of Motion

Kinematics in One Dimension

Vectors and Coordinate Systems

Kinematics in Two Dimensions

Force and Motion

Dynamics I: Motion Along a Line

Newtons Third Law

Dynamics Ii: Motion in a Plane

Work and Kinetic Energy

Interactions and Potential Energy

Impulse and Momentum

Rotation of a Rigid Body

Newtons Theory of Gravity

Fluids and Elasticity

Oscillations

Traveling Waves

Superposition

A Macroscopic Description of Matter

Work, Heat, and the First Law of Thermodynamics

The Micromacro Connection

Heat Engines and Refrigerators

Electric Charges and Forces

The Electric Field

Gausss Law

The Electric Potential

Potential and Field

Current and Resistance

The Magnetic Field

Electromagnetic Induction

Electromagnetic Fields and Waves

Ac Circuits

Wave Optics

Ray Optics

Optical Instruments

Relativity

The Foundations of Modern Physics

Quantization

Wave Functions and Uncertainty

One-Dimensional Quantum Mechanics

Atomic Physics

Nuclear Physics

Filters

A multiloop circuit is shown in the figure. Some circuit quantities are not labeled. It is not necessary to solve the entire circuit. The current I₁ is closest to

A multiloop circuit is shown in the figure. It is not necessary to solve the entire circuit. The current I₂ is closest to

A multiloop circuit is shown in the figure. Some circuit quantities are not labeled. It is not necessary to solve the entire circuit. The current I₂ is closest to