Question 1

A current of 2.0 A in the 100-turn primary of an ideal transformer causes 14 A to flow in the secondary. How many turns are in the secondary?

Accepted Answer

A)  14 
B)  4 
C)  700 
D)  114 
A)  14 
B)  4 
C)  700 
D)  114

Question 2

In a series circuit containing a resistor and an inductor connected to an ideal dc source and a switch, the inductor gets 40% of its maximum current 1.8 s after the switch is closed. What is the
Time constant of this circuit?

Accepted Answer

A)  2.5 s 
B)  0.80 s 
C)  3.5 s 
D)  5.5 s 
E)  1.5 s 
A)  2.5 s 
B)  0.80 s 
C)  3.5 s 
D)  5.5 s 
E)  1.5 s

Question 3

The graph in the figure shows the position of an object as a function of time. The letters
H-L represent particular moments of time.   (a) At which moment in time is the speed of the object the greatest?
(b) At which moment in time is the speed of the object equal to zero?

Accepted Answer

The answer of The graph in the figure shows the...

Question 4

As you stand by the side of the road, a car approaches you at a constant speed, sounding its horn, and you hear a frequency of 76 Hz. After the car goes by, you hear a frequency of 65 Hz. What is
The speed of the car? The speed of sound in the air is 343 m/s.

Accepted Answer

A)  29 m/s 
B)  27 m/s 
C)  30 m/s 
D)  26 m/s 
E)  28 m/s 
A)  29 m/s 
B)  27 m/s 
C)  30 m/s 
D)  26 m/s 
E)  28 m/s

Question 5

A stretched string is observed to have four equal segments in a standing wave driven at a frequency of 480 Hz. What driving frequency will set up a standing wave with five equal
Segments?

Accepted Answer

A)  120 Hz 
B)  240 Hz 
C)  600 Hz 
D)  360 Hz 
A)  120 Hz 
B)  240 Hz 
C)  600 Hz 
D)  360 Hz

Question 6

A circular coil of copper wire is lying flat on a horizontal table. A bar magnet is held above the center of the coil with its south pole downward. The magnet is released from rest and falls toward
The coil. As viewed from above, what is the direction of the current induced in the coil as the
Magnet approaches the coil?

Accepted Answer

A)  clockwise 
B)  counterclockwise 
C)  No current is induced in the coil. 
D)  An emf but no current is induced in the coil. 
A)  clockwise 
B)  counterclockwise 
C)  No current is induced in the coil. 
D)  An emf but no current is induced in the coil.

Question 7

A 10-kg rock and 20-kg rock are dropped from the same height and experience no significant air resistance. If it takes the 20-kg rock a time  T  to reach the ground, what time will it take the 10-kg rock to reach the ground?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 8

A train starts from rest and accelerates uniformly until it has traveled  5.6 km and acquired a forward velocity of  42 m/s. The train then moves at a constant velocity of  42 m/s for  420 s. The train then slows down uniformly at   until it is brought to a halt. The acceleration during the first  5.6 km of travel is closest to which of the following?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 9

The length of a certain wire is kept same while its radius is doubled. What is the new resistivity of this wire?

Accepted Answer

A)  It is increased by a factor of 4. 
B)  It is reduced by a factor of 4. 
C)  It is increased by a factor of 2. 
D)  It is reduced by a factor of 2. 
E)  It does not change. 
A)  It is increased by a factor of 4. 
B)  It is reduced by a factor of 4. 
C)  It is increased by a factor of 2. 
D)  It is reduced by a factor of 2. 
E)  It does not change.

Question 10

The potential difference between the plates of an ideal air-filled parallel-plate capacitor with a plate separation of 6.0 cm is 60 V. What is the strength of the electric field between the plates of this
Capacitor?

Accepted Answer

A)  60 V/m 
B)  2000 V/m 
C)  3600 V/m 
D)  1000 V/m 
E)  500 V/m 
A)  60 V/m 
B)  2000 V/m 
C)  3600 V/m 
D)  1000 V/m 
E)  500 V/m

Question 11

A certain test car can go from rest to 32.0 m/s in 3.88 s. The same car can come to a full stop from that speed in 4.14 s. What is the ratio of the magnitude of the starting acceleration to the stopping
Acceleration?

Accepted Answer

A)  1.07 
B)  0.937 
C)  1.14 
D)  0.878 
A)  1.07 
B)  0.937 
C)  1.14 
D)  0.878

Question 12

Two metal spheres are made of the same material and have the same diameter, but one is solid and the other is hollow. If their temperature is increased by the same amount,

Accepted Answer

A)  the solid sphere becomes less dense and the hollow one denser. 
B)  the solid sphere becomes bigger than the hollow one. 
C)  the solid sphere becomes denser and the hollow one less dense. 
D)  the two spheres remain of equal size. 
E)  the hollow sphere becomes bigger than the solid one. 
A)  the solid sphere becomes less dense and the hollow one denser. 
B)  the solid sphere becomes bigger than the hollow one. 
C)  the solid sphere becomes denser and the hollow one less dense. 
D)  the two spheres remain of equal size. 
E)  the hollow sphere becomes bigger than the solid one.

Question 13

Human reaction times are worsened by alcohol. How much further (in feet) would a drunk
driver's car travel before he hits the brakes than a sober driver's car? Assume that both are
initially traveling at 50.0 mi/h and their cars have the same acceleration while slowing
down, and that the sober driver takes 0.33 s to hit the brakes in a crisis, while the drunk
driver takes 1.0 s to do so. (5280 ft = 1 mi)

Accepted Answer

The answer of Human reaction times are worsened by alcohol....

Question 14

A nuclear power plant has an actual efficiency of 33%. If 0.19 MW of energy are released from fission, how much electric power does the power plant produce?

Accepted Answer

A)  25 MW 
B)  0.25 MW 
C)  6.3 MW 
D)  0.063 MW 
A)  25 MW 
B)  0.25 MW 
C)  6.3 MW 
D)  0.063 MW

Question 15

Four unequal resistors are connected in series with each other. Which one of the following statements is correct about this combination?

Accepted Answer

A)  The equivalent resistance is more than the largest resistance. 
B)  The equivalent resistance is equal to average of the four resistances. 
C)  The equivalent resistance is equal to that of any one of the resistors. 
D)  The equivalent resistance is less than that of the smallest resistor. 
E)  The equivalent resistance is less than that of the largest resistor. 
A)  The equivalent resistance is more than the largest resistance. 
B)  The equivalent resistance is equal to average of the four resistances. 
C)  The equivalent resistance is equal to that of any one of the resistors. 
D)  The equivalent resistance is less than that of the smallest resistor. 
E)  The equivalent resistance is less than that of the largest resistor.

Question 16

A coil lies flat on a horizontal tabletop in a region where the magnetic field points straight down. The magnetic field disappears suddenly. When viewed from above, what is the direction of the
Induced current in this coil as the field disappears?

Accepted Answer

A)  clockwise 
B)  There is no induced current in this coil. 
C)  counterclockwise 
D)  clockwise initially, then counterclockwise before stopping 
A)  clockwise 
B)  There is no induced current in this coil. 
C)  counterclockwise 
D)  clockwise initially, then counterclockwise before stopping

Question 17

A laser is thrown upward with a speed of  12 m/s on the surface of planet  X  where the acceleration due to gravity is   and there is no atmosphere. What is the maximum height reached by the laser?

Accepted Answer

A)   8.0 m 
B)   144 m 
C)   48 m 
D)   18 m 
A)   8.0 m 
B)   144 m 
C)   48 m 
D)   18 m

Question 18

What is the power factor for a series ac circuit containing a   resistor, a   capacitor, and a  0.45-H inductor, when connected to a  60-Hz  power supply?

Accepted Answer

A)  0.00 
B)  0.46 
C)  1.0 
D)  0.79 
A)  0.00 
B)  0.46 
C)  1.0 
D)  0.79

Question 19

Two in-phase loudspeakers are placed along a wall and are separated by a distance of 4.00 m. They emit sound with a frequency of 514 Hz. A person is standing away from the wall, in front of
One of the loudspeakers. What is the closest distance from the wall the person can stand and hear
Destructive interference? The speed of sound in air is 343 m/s.

Accepted Answer

A)  0.73 m 
B)  0.34 m 
C)  0.37 m 
D)  1.2 m 
E)  1.6 m 
A)  0.73 m 
B)  0.34 m 
C)  0.37 m 
D)  1.2 m 
E)  1.6 m

Question 20

A fixed amount of an ideal monatomic gas is maintained at constant volume as it is cooled by 50 K. This feat is accomplished by removing 400 J of energy from the gas. How much work is done by
The gas during this process?

Accepted Answer

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

Exam 2: Describing Motion: Kinematics in One Dimension

A current of 2.0 A in the 100-turn primary of an ideal transformer causes 14 A to flow in the secondary. How many turns are in the secondary?

In a series circuit containing a resistor and an inductor connected to an ideal dc source and a switch, the inductor gets 40% of its maximum current 1.8 s after the switch is closed. What is the Time constant of this circuit?

The graph in the figure shows the position of an object as a function of time. The letters H-L represent particular moments of time. (a) At which moment in time is the speed of the object the greatest? (b) At which moment in time is the speed of the object equal to zero?

As you stand by the side of the road, a car approaches you at a constant speed, sounding its horn, and you hear a frequency of 76 Hz. After the car goes by, you hear a frequency of 65 Hz. What is The speed of the car? The speed of sound in the air is 343 m/s.

A stretched string is observed to have four equal segments in a standing wave driven at a frequency of 480 Hz. What driving frequency will set up a standing wave with five equal Segments?

A 10-kg rock and 20-kg rock are dropped from the same height and experience no significant air resistance. If it takes the 20-kg rock a time T to reach the ground, what time will it take the 10-kg rock to reach the ground?

The length of a certain wire is kept same while its radius is doubled. What is the new resistivity of this wire?

The potential difference between the plates of an ideal air-filled parallel-plate capacitor with a plate separation of 6.0 cm is 60 V. What is the strength of the electric field between the plates of this Capacitor?

A certain test car can go from rest to 32.0 m/s in 3.88 s. The same car can come to a full stop from that speed in 4.14 s. What is the ratio of the magnitude of the starting acceleration to the stopping Acceleration?

Two metal spheres are made of the same material and have the same diameter, but one is solid and the other is hollow. If their temperature is increased by the same amount,

A nuclear power plant has an actual efficiency of 33%. If 0.19 MW of energy are released from fission, how much electric power does the power plant produce?

Four unequal resistors are connected in series with each other. Which one of the following statements is correct about this combination?

A coil lies flat on a horizontal tabletop in a region where the magnetic field points straight down. The magnetic field disappears suddenly. When viewed from above, what is the direction of the Induced current in this coil as the field disappears?

A laser is thrown upward with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity is and there is no atmosphere. What is the maximum height reached by the laser?

What is the power factor for a series ac circuit containing a resistor, a capacitor, and a 0.45-H inductor, when connected to a 60-Hz power supply?

A fixed amount of an ideal monatomic gas is maintained at constant volume as it is cooled by 50 K. This feat is accomplished by removing 400 J of energy from the gas. How much work is done by The gas during this process?

Introduction, Measurement, Estimating

Kinematics in Two Dimensions; Vectors

Dynamics: Newtons Laws of Motion

Circular Motion; Gravitation

Work and Energy

Linear Momentum

Rotational Motion

Static Equilibrium; Elasticity and Fracture

Fluids

Oscillations and Waves

Sound

Temperature and Kinetic Theory

Heat

The Laws of Thermodynamics

Electric Charge and Electric Field

Electric Potential

Electric Currents

Dc Circuits

Magnetism

Electromagnetic Induction and Faradays Law

Electromagnetic Waves

Light: Geometric Optics

The Wave Nature of Light

Optical Instruments

The Special Theory of Relativity

Early Quantum Theory and Models of the Atom

Quantum Mechanics of Atoms

Molecules and Solids

Nuclear Physics and Radioactivity

Nuclear Energy; Effects and Uses of Radiation

Elementary Particles

Astrophysics and Cosmology

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