Question 1

In order to construct a voltmeter from a galvanometer, one normally would

Accepted Answer

A)  use a very large series resistor. 
B)  use a very small series resistor. 
C)  use a very large shunt resistor. 
D)  use a very small shunt resistor.

Question 2

A whistle produces sound of frequency of 1.00 kHz. If a listener moves with a speed of 30 m/s away from the whistle, what frequency does this person hear if the sound speed is 340 m/s?

Accepted Answer

A)  1090 Hz 
B)  919 Hz 
C)  912 Hz 
D)  1000 Hz

Question 3

When two or more different capacitors are connected in series across a potential source, which of the following statements must be true? (There could be more than one correct choice.)

Accepted Answer

A)  The total voltage across the combination is the algebraic sum of the voltages across the individual capacitors. 
B)  The capacitor with the largest capacitance has the most charge. 
C)  Each capacitor carries the same amount of charge. 
D)  The equivalent capacitance of the combination is less than the capacitance of any of the capacitors. 
E)  The potential difference across each capacitor is the same.

Question 4

If you wanted to know how much the temperature of a particular piece of material would rise when a known amount of heat was added to it, which of the following quantities would be most
Helpful to know?

Accepted Answer

A)  density 
B)  thermal conductivity 
C)  coefficient of linear expansion 
D)  specific heat 
E)  initial temperature

Question 5

How many nanoseconds does it take for a computer to perform one calculation if it performs 6.7 × 107 calculations per second?

Accepted Answer

A)  15 ns 
B)  67 ns 
C)  65 ns 
D)  11 ns

Question 6

A parallel-plate capacitor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge
Leaks off. As the plates are being separated, the energy stored in this capacitor

Accepted Answer

A)  decreases. 
B)  increases. 
C)  does not change. 
D)  become zero.

Question 7

A 0.588-m string is tightly clamped at both ends. If the lowest standing wave frequency of the string is 326 Hz, how fast do waves travel on this string?

Accepted Answer

A)  383 m/s 
B)  475 m/s 
C)  724 m/s 
D)  582 m/s

Question 8

You are given a copper bar of dimensions 3 cm × 5 cm × 8 cm and asked to attach leads to it in order to make a resistor. If you want to achieve the largest possible resistance, you should attach
The leads to the opposite faces that measure

Accepted Answer

A)  3 cm × 8 cm. 
B)  5 cm × 8 cm. 
C)  3 cm × 5 cm. 
D)  Any pair of faces produces the same resistance.

Question 9

Which statements must be true about the surface of a charged conductor in which no charge is moving? (There could be more than one correct choice.)

Accepted Answer

A)  The electric potential of the surface is zero. 
B)  The electric field is constant at the surface. 
C)  The electric potential is constant over the surface. 
D)  The electric field is perpendicular to the surface. 
E)  The electric field is zero at the surface.

Question 10

A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m. She completes one lap in 100 seconds. What is her average
Speed?

Accepted Answer

A)  5.0 m/s 
B)  10 m/s 
C)  0 m/s 
D)  2.5 m/s 
E)  1.3 m/s

Question 11

The intensity at a distance of 6.0 m from a source that is radiating equally in all directions is 6.0 × 10-10 W/m2. What is the intensity level in dB? The threshold of human hearing is 1.0 × 10-12
W/m2.

Accepted Answer

A)  23 dB 
B)  28 dB 
C)  18 dB 
D)  32 dB

Question 12

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and experience no significant air resistance. If the 10-kg rock reaches a maximum height h, what maximum height
Will the 20-kg ball reach?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 13

When 5.0 A at 110 V flows in the primary of an ideal transformer, how many amps at 24 V can flow in the secondary?

Accepted Answer

A)  5.0 A 
B)  1.1 A 
C)  4.6 A 
D)  23 A

Question 14

A 0.150-kg cart that is attached to an ideal spring with a force constant (spring constant) of 3.58 N/m undergoes simple harmonic oscillations with an amplitude of 7.50 cm. What is the total
Mechanical energy of the system?

Accepted Answer

A)  0.0201 J 
B)  0.134 J 
C)  0.269 J 
D)  0.0101 J 
E)  0 J

Question 15

If we double the resistance in a circuit but keep the current in it constant, the power dissipated by that circuit will

Accepted Answer

A)  be one-fourth as great. 
B)  be two times as great. 
C)  be one-half as great. 
D)  be four times as great.

Question 16

In many cartoon shows, a character runs off a cliff, realizes his predicament, and lets out a scream. He continues to scream as he falls. If the physical situation is portrayed correctly, from the vantage
Point of an observer at the foot of the cliff, the pitch of the scream as he falls should be

Accepted Answer

A)  lower than the original pitch and constant. 
B)  higher than the original pitch and constant. 
C)  lower than the original pitch and decreasing as he falls. 
D)  higher than the original pitch and increasing as he falls. 
E)  It is impossible to predict.

Question 17

Suppose that a car traveling to the west begins to slow down as it approaches a traffic light. Which of the following statements about its acceleration is correct?

Accepted Answer

A)  Since the car is slowing down, its acceleration must be negative. 
B)  The acceleration is toward the west. 
C)  The acceleration is zero. 
D)  The acceleration is toward the east.

Question 18

The slope of a position versus time graph gives

Accepted Answer

A)  acceleration. 
B)  velocity. 
C)  the distance traveled. 
D)  displacement.

Question 19

The primary coil of an ideal transformer has 100 turns and its secondary coil has 400 turns. If the ac current in the secondary coil is 2 A, what is the current in its primary coil?

Accepted Answer

A)  1/4 A 
B)  8 A 
C)  4 A 
D)  2 A 
E)  1/2 A

Question 20

The work done on an ideal gas system in an isothermal process is -400 J. What is the change in internal (thermal) energy of the gas?

Accepted Answer

A)  400 J 
B)  0 J 
C)  -400 J 
D)  200 J

Exam 2: Describing Motion: Kinematics in One Dimension

In order to construct a voltmeter from a galvanometer, one normally would

A whistle produces sound of frequency of 1.00 kHz. If a listener moves with a speed of 30 m/s away from the whistle, what frequency does this person hear if the sound speed is 340 m/s?

When two or more different capacitors are connected in series across a potential source, which of the following statements must be true? (There could be more than one correct choice.)

If you wanted to know how much the temperature of a particular piece of material would rise when a known amount of heat was added to it, which of the following quantities would be most Helpful to know?

How many nanoseconds does it take for a computer to perform one calculation if it performs 6.7 × 107 calculations per second?

A parallel-plate capacitor is connected to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge Leaks off. As the plates are being separated, the energy stored in this capacitor

A 0.588-m string is tightly clamped at both ends. If the lowest standing wave frequency of the string is 326 Hz, how fast do waves travel on this string?

You are given a copper bar of dimensions 3 cm × 5 cm × 8 cm and asked to attach leads to it in order to make a resistor. If you want to achieve the largest possible resistance, you should attach The leads to the opposite faces that measure

Which statements must be true about the surface of a charged conductor in which no charge is moving? (There could be more than one correct choice.)

A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m. She completes one lap in 100 seconds. What is her average Speed?

The intensity at a distance of 6.0 m from a source that is radiating equally in all directions is 6.0 × 10-10 W/m2. What is the intensity level in dB? The threshold of human hearing is 1.0 × 10-12 W/m2.

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and experience no significant air resistance. If the 10-kg rock reaches a maximum height h, what maximum height Will the 20-kg ball reach?