Question 1

How much energy is stored in a room 3.0 m by 4.0 m by 2.4 m due to the earth's magnetic field with a strength of 5.0 × 10-5 T? (μ0 = 4π × 10-7 T • m/A)

Accepted Answer

A)  570 mJ. 
B)  29 mJ. 
C)  10 mJ. 
D)  100 mJ. 
A)  570 mJ. 
B)  29 mJ. 
C)  10 mJ. 
D)  100 mJ.

Question 2

A series LRC ac circuit has a peak current of 1.0 A with a frequency of 54 kHz.If the resistance of the circuit is 51 kΩ,the capacitance of the circuit is 19 μF,and the inductance of the circuit is 25 μH,determine the average power of the circuit.

Accepted Answer

A)  26 kW 
B)  77 kW 
C)  7.7 kW 
D)  4.1 kW 
A)  26 kW 
B)  77 kW 
C)  7.7 kW 
D)  4.1 kW

Question 3

You are driving along a highway at 35.0 m/s when you hear the siren of a police car approaching you from behind and you perceive the frequency as 1310 Hz.You are relieved that he is in pursuit of a different speeder when he continues past you,but now you perceive the frequency as 1240 Hz.What is the frequency of the siren in the police car? The speed of sound in air is 343 m/s.

Accepted Answer

A)  1300 Hz 
B)  1320 Hz 
C)  1270 Hz 
D)  1360 Hz 
E)  1370 Hz 
A)  1300 Hz 
B)  1320 Hz 
C)  1270 Hz 
D)  1360 Hz 
E)  1370 Hz

Question 4

A child on a sled starts from rest at the top of a 15° slope.If the trip to the bottom takes 15.2 s,how long is the slope? Assume that frictional forces may be neglected.

Accepted Answer

A)  293 m 
B)  586 m 
C)  1130 m 
D)  147 m 
A)  293 m 
B)  586 m 
C)  1130 m 
D)  147 m

Question 5

Two equal positive charges are held in place at a fixed distance.If you put a third positive charge midway between these two charges,its electrical potential energy of the system (relative to infinity)is zero because the electrical forces on the third charge due to the two fixed charges just balance each other.

Accepted Answer

A) True 
 B)False

Question 6

A 3.00-kg ball rests in a frictionless groove as shown in the figure.   
(a)What is the magnitude of the force that the left side of the groove exerts on the ball?
(b)What is the magnitude of the force that the right side of the groove exerts on the ball?

Accepted Answer

(a)26.4 N

Question 7

Which of the graphs in the figure represents a spring that gets less stiff the more it is stretched?

Accepted Answer

A)  Graph a 
B)  Graph b 
C)  Graph c 
D)  Graph d 
A)  Graph a 
B)  Graph b 
C)  Graph c 
D)  Graph d

Question 8

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.

Question 9

A charge Q is uniformly spread over one surface of a very large nonconducting square elastic sheet having sides of length d.At a point P that is 1.25 cm outside the sheet,the magnitude of the electric field due to the sheet is E.If the sheet is now stretched so that its sides have length 2d,what is the magnitude of the electric field at P?

Accepted Answer

A)  4E 
B)  2E 
C)  E 
D)  E/2 
E)  E/4 
A)  4E 
B)  2E 
C)  E 
D)  E/2 
E)  E/4

Question 10

A negative charge,if free,will tend to move

Accepted Answer

A)  from high potential to low potential. 
B)  from low potential to high potential. 
C)  toward infinity. 
D)  away from infinity. 
E)  in the direction of the electric field. 
A)  from high potential to low potential. 
B)  from low potential to high potential. 
C)  toward infinity. 
D)  away from infinity. 
E)  in the direction of the electric field.

Question 11

What is the difference between 103.5 and 102.24 written with the correct number of significant figures?

Accepted Answer

A)  1 
B)  1.3 
C)  1.26 
D)  1.260 
E)  1.2600 
A)  1 
B)  1.3 
C)  1.26 
D)  1.260 
E)  1.2600

Question 12

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 13

A weather balloon contains 12.0 m3 of hydrogen gas when the balloon is released from a location at which the temperature is 22.0°C and the pressure is 101 kPa.The balloon rises to a location where the temperature is -30.0°C and the pressure is 20.0 kPa.If the balloon is free to expand so that the pressure of the gas inside is equal to the ambient pressure,what is the new volume of the balloon? Assume that in both cases the hydrogen gas is in thermal equilibrium with the outside air.

Accepted Answer

A)  14.0 m3 
B)  2.38 m3 
C)  49.9 m3 
D)  82.6 m3 
E)  4.16 m3 
A)  14.0 m3 
B)  2.38 m3 
C)  49.9 m3 
D)  82.6 m3 
E)  4.16 m3

Question 14

Consider the group of three+2.4 nC point charges shown in the figure.What is the electric potential energy of this system of charges relative to infinity? (k = 1/4πε0 = 8.99 × 109 N • m2/C2)

Accepted Answer

A)  4.1 × 10-6 J 
B)  4.6 × 10-6 J 
C)  4.2 × 10-6 J 
D)  4.4 × 10-6 J 
A)  4.1 × 10-6 J 
B)  4.6 × 10-6 J 
C)  4.2 × 10-6 J 
D)  4.4 × 10-6 J

Question 15

A 50.0-kg block is being pulled up a 16.0° slope by a force of 250 N which is parallel to the slope.The coefficient of kinetic friction between the block and the slope is 0.200.What is the magnitude of the acceleration of the block?

Accepted Answer

A)  0.528 m/s2 
B)  0.158 m/s2 
C)  0.412 m/s2 
D)  0.983 m/s2 
E)  0.260 m/s2 
A)  0.528 m/s2 
B)  0.158 m/s2 
C)  0.412 m/s2 
D)  0.983 m/s2 
E)  0.260 m/s2

Question 16

For the circuit shown in the figure,what is the current through resistor R1?

Accepted Answer

A)  0.071 A 
B)  0.13 A 
C)  0.029 A 
D)  0.016 A 
A)  0.071 A 
B)  0.13 A 
C)  0.029 A 
D)  0.016 A

Question 17

Two thin 80.0-cm rods are oriented at right angles to each other.Each rod has one end at the origin of the coordinates,and one of them extends along the +x-axis while the other extends along the +y-axis.The rod along the +x-axis carries a charge of -15.0 µC distributed uniformly along its length,and the other rod carries +15.0 µC uniformly over its length.Find the magnitude and direction of the net electrical force that these two rods exert on an electron located at the point (40.0 cm,40.0 cm).(e = 1.60 × 10-19 C,
ε0 = 8.85 × 10-12 C2/N • m2)

Accepted Answer

1.35 × 10^-13

Question 18

A graph of the force on an object as a function of its position is shown in the figure. Determine the amount of work done by this force on an object that moves from x = 1.0 m to x = 6.0 m. (Assume an accuracy of 2 significant figures for the numbers on the graph.)

Accepted Answer

A)  26 J 
B)  29 J 
C)  22 J 
D)  35 J 
E)  27 J 
A)  26 J 
B)  29 J 
C)  22 J 
D)  35 J 
E)  27 J

Question 19

As shown in the figure,a small particle of charge q = -7.0 × 10-6 C and mass m = 3.1 × 10-12 kg has velocity v0 = 9.4 × 103 m/s as it enters a region of uniform magnetic field.The particle is observed to travel in the semicircular path shown,with radius R = 5.0 cm.Calculate the magnitude and direction of the magnetic field in the region.

Accepted Answer

0.083 T
,d

Question 20

The y-component of the electric field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation Ey = (375 N/C)cos[kx - (2.20 × 1014 rad/s)t].(c = 3.0 × 108 m/s)
(a)What is the largest that the x-component of the wave can be?
(b)What is the largest that the z-component of the wave can be?

Accepted Answer

Exam 1: A: Foundations

How much energy is stored in a room 3.0 m by 4.0 m by 2.4 m due to the earth's magnetic field with a strength of 5.0 × 10-5 T? (μ0 = 4π × 10-7 T • m/A)

A series LRC ac circuit has a peak current of 1.0 A with a frequency of 54 kHz.If the resistance of the circuit is 51 kΩ,the capacitance of the circuit is 19 μF,and the inductance of the circuit is 25 μH,determine the average power of the circuit.

A child on a sled starts from rest at the top of a 15° slope.If the trip to the bottom takes 15.2 s,how long is the slope? Assume that frictional forces may be neglected.

A 3.00-kg ball rests in a frictionless groove as shown in the figure. (a)What is the magnitude of the force that the left side of the groove exerts on the ball? (b)What is the magnitude of the force that the right side of the groove exerts on the ball?

Which of the graphs in the figure represents a spring that gets less stiff the more it is stretched?

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 negative charge,if free,will tend to move

What is the difference between 103.5 and 102.24 written with the correct number of significant figures?

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?

Consider the group of three+2.4 nC point charges shown in the figure.What is the electric potential energy of this system of charges relative to infinity? (k = 1/4πε0 = 8.99 × 109 N • m2/C2)

A 50.0-kg block is being pulled up a 16.0° slope by a force of 250 N which is parallel to the slope.The coefficient of kinetic friction between the block and the slope is 0.200.What is the magnitude of the acceleration of the block?

For the circuit shown in the figure,what is the current through resistor R1?

A graph of the force on an object as a function of its position is shown in the figure. Determine the amount of work done by this force on an object that moves from x = 1.0 m to x = 6.0 m. (Assume an accuracy of 2 significant figures for the numbers on the graph.)

Foundations

Motion in One Dimension

Acceleration

Momentum

Energy

Principle of Relativity

Interactions

Force

Work

Motion in a Plane

Motion in a Circle

Torque

Gravity

Special Relativity

Periodic Motion

Waves in One Dimension

Waves in Two and Three Dimensions

Fluids

Entropy

Energy Transferred Thermally

Degradation of Energy

Electric Interactions

The Electric Field

Gausss Law

Work and Energy in Electrostatics

Charge Separation and Storage

Magnetic Interactions

Magnetic Fields of Charged Particles in Motion

Changing Magnetic Fields

Changing Electric Fields

Electric Circuits

Electronics

Ray Optics

Wave and Particle Optics

Filters

How much energy is stored in a room 3.0 m by 4.0 m by 2.4 m due to the earth's magnetic field with a strength of 5.0 × 10^-5 T? (μ₀ = 4π × 10^-7 T • m/A)

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

Consider the group of three+2.4 nC point charges shown in the figure.What is the electric potential energy of this system of charges relative to infinity? (k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²)

For the circuit shown in the figure,what is the current through resistor R₁?