Question 1

A stalled car is being pushed up a hill at constant velocity by three people.The net force on the car is

Accepted Answer

A)  zero. 
B)  up the hill and equal to the weight of the car. 
C)  down the hill and equal to the weight of the car. 
D)  up the hill and greater than the weight of the car. 
E)  down the hill and greater than the weight of the car.

Question 2

Consider a uniform solid sphere of radius R and mass M rolling without slipping.Which form of its kinetic energy is larger,translational or rotational?

Accepted Answer

A)  Its translational kinetic energy is larger than its rotational kinetic energy. 
B)  Its rotational kinetic energy is larger than its translational kinetic energy. 
C)  Both forms of energy are equal. 
D)  You need to know the speed of the sphere to tell.

Question 3

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 with a current that is 50% of the current rating of the bulb,what is the actual power drawn by the bulb?

Accepted Answer

A)  10 W 
B)  15 W 
C)  20 W 
D)  25 W 
E)  30 W

Question 4

If the torque on an object adds up to zero

Accepted Answer

A)  the forces on it also add up to zero. 
B)  the object is at rest. 
C)  the object cannot be turning. 
D)  the object could be accelerating linearly but it could not be turning. 
E)  the object could be both turning and accelerating linearly.

Question 5

A double-concave lens has equal radii of curvature of 15.1 cm.An object placed 14.2 cm from the lens forms a virtual image 5.29 cm from the lens.What is the index of refraction of the lens material?

Accepted Answer

A)  1.90 
B)  1.98 
C)  1.82 
D)  1.77

Question 6

As shown in the figure,two long straight wires are separated by a distance of d = 0.80 m.The currents are I₁ = 2.0 A to the right in the upper wire and I₂ = 7.0 A to the left in the lower wire.What are the magnitude and direction of the magnetic field at point P,which is a distance d/2 = 0.40 m below the lower wire? (μ₀ = 4π × 10^-7 T • m/A)

Accepted Answer

The answer of As shown in the figure,two long straight...

Question 7

Two very long parallel wires in the xy-plane,a distance 2a apart,are parallel to the y-axis and carry equal currents I as shown in the figure.The +z direction points perpendicular to the xy-plane in a right-handed coordinate system.If the left current flows in the +y direction and the right current flows in the -y direction,which one of the graphs shown in the figure below best represents the z component of the net magnetic field,in the xy-plane,as a function of x? (Caution: These graphs are not magnetic field lines.)

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 8

When a potential difference of 10 V is placed across a certain solid cylindrical resistor,the current through it is 2 A.If the diameter of this resistor is now tripled,the current will be

Accepted Answer

A)  2/9 A. 
B)  2/3 A. 
C)  2 A. 
D)  3 A. 
E)  18 A.

Question 9

Light of wavelength 633 nm from a He-Ne laser passes through a circular aperture and is observed on a screen 4.0 m behind the aperture.The diameter of the central bright area is 5.4 cm.What is the diameter of the aperture?

Accepted Answer

A)  110 μm 
B)  2.0 μm 
C)  6600 μm 
D)  960 μm

Question 10

The electric field 1.5 cm from a very small charged object points toward the object with a magnitude of 180,000 N/C.What is the charge on the object? (k = 1/4πε0 = 8.99 × 109 N • m2/C2)

Accepted Answer

A)  -4.5 nC 
B)  +4.5 nC 
C)  -5.0 nC 
D)  +5.0 nC

Question 11

An optical system comprises in turn,from left to right: an observer,a lens of focal length +30 cm,an erect object 20 mm high,and a convex mirror of radius 80 cm.The object is between the lens and the mirror,20 cm from the lens and 50 cm from the mirror.The observer views the image that is formed first by reflection and then by refraction.What is the position of the final image,measured from the mirror?

Accepted Answer

A)  90 cm 
B)  102 cm 
C)  114 cm 
D)  126 cm 
E)  138 cm

Question 12

The current in a wire varies with time according to the equation I(t)= 6.00 A + (4.80 A/s)t,where t is in seconds.How many coulombs of charge pass a cross section of the wire in the time period between t = 0.00 s and t = 3.00 s?

Accepted Answer

The answer of The current in a wire varies with...

Question 13

Light of wavelength 575 nm passes through a double-slit and the third order bright fringe is seen at an angle of 6.5° away from the central fringe. What is the separation between the double slits?

Accepted Answer

A)  5.0 µm 
B)  10 µm 
C)  15 µm 
D)  20 µm 
E)  25 µm

Question 14

An airplane flies between two points on the ground that are 500 km apart. The destination is directly north of the origination of the flight. The plane flies with an air speed of 120 m/s. If a constant wind blows at 10.0 m/s due west during the flight,what direction must the plane fly relative to north to arrive at the destination?

Accepted Answer

A)  4.78° east of north 
B)  4.76° east of north 
C)  85.2° west of north 
D)  4.78° west of north 
E)  4.76° west of north

Question 15

A ray of light passes from glass into a liquid,as shown in the figure.What is the speed of the light in the liquid? (c = 3.00 × 10⁸ m/s)

Accepted Answer

The answer of A ray of light passes from glass...

Question 16

The figure shows a bar magnet moving vertically upward toward a horizontal coil.The poles of the bar magnets are labeled X and Y.As the bar magnet approaches the coil it induces an electric current in the direction indicated on the figure (counter-clockwise as viewed from above).What are the correct polarities of the magnet?

Accepted Answer

A)  X is a south pole, Y is a north pole. 
B)  X is a north pole, Y is a south pole. 
C)  Both X and Y are north poles. 
D)  Both X and Y are south poles. 
E)  The polarities of the magnet cannot be determined from the information given.

Question 17

Two point charges of +20.0 μC and -8.00 μC are separated by a distance of 20.0 cm.What is the magnitude of electric field due to these charges at a point midway between them?
(k = 1/4πε0 = 8.99 × 109 N • m2/C2)

Accepted Answer

A)  25.2 × 106 N/C directed toward the negative charge 
B)  25.2 × 106 N/C directed toward the positive charge 
C)  25.2 × 105 N/C directed toward the negative charge 
D)  25.2 × 105 N/C directed toward the positive charge 
E)  25.2 × 104 N/C directed toward the negative charge

Question 18

A 12,000-N car is raised using a hydraulic lift,which consists of a U-tube with arms of unequal areas,filled with incompressible oil with a density of 800 kg/m3 and capped at both ends with tight-fitting pistons.The wider arm of the U-tube has a radius of 18.0 cm and the narrower arm has a radius of 5.00 cm.The car rests on the piston on the wider arm of the U-tube.The pistons are initially at the same level.What is the force that must be applied to the smaller piston in order to lift the car after it has been raised 1.20 m? (For purposes of this problem,you can neglect the weight of the pistons.)

Accepted Answer

A)  0.954 kN 
B)  1.88 kN 
C)  1.96 kN 
D)  3.67 kN 
E)  1.20 kN

Question 19

The scalar product of vector  = 3.00 
+ 2)00 
And vector 
Is 10.0. Which of the following vectors could be vector 
?

Accepted Answer

A)  2.00  + 4.00
 
B)  4.00  + 6.00
 
C)  5.00  + 4.00
 
D)  12.0  
E)  2.00  + 2.00

Question 20

A 5.0-m long,12-kg uniform ladder rests against a smooth vertical wall with the bottom of the ladder 3.0 m from the wall.The coefficient of static friction between the floor and the ladder is 0.28.What distance,measured along the ladder from the bottom,can a 60-kg person climb before the ladder starts to slip?

Accepted Answer

A)  4.0 m 
B)  3.7 m 
C)  1.7 m 
D)  1.3 m 
E)  3.3 m

Exam 1: A: Foundations

A stalled car is being pushed up a hill at constant velocity by three people.The net force on the car is

Consider a uniform solid sphere of radius R and mass M rolling without slipping.Which form of its kinetic energy is larger,translational or rotational?

If the torque on an object adds up to zero

A double-concave lens has equal radii of curvature of 15.1 cm.An object placed 14.2 cm from the lens forms a virtual image 5.29 cm from the lens.What is the index of refraction of the lens material?

When a potential difference of 10 V is placed across a certain solid cylindrical resistor,the current through it is 2 A.If the diameter of this resistor is now tripled,the current will be

Light of wavelength 633 nm from a He-Ne laser passes through a circular aperture and is observed on a screen 4.0 m behind the aperture.The diameter of the central bright area is 5.4 cm.What is the diameter of the aperture?

The electric field 1.5 cm from a very small charged object points toward the object with a magnitude of 180,000 N/C.What is the charge on the object? (k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²)

The current in a wire varies with time according to the equation I(t)= 6.00 A + (4.80 A/s)t,where t is in seconds.How many coulombs of charge pass a cross section of the wire in the time period between t = 0.00 s and t = 3.00 s?

Light of wavelength 575 nm passes through a double-slit and the third order bright fringe is seen at an angle of 6.5° away from the central fringe. What is the separation between the double slits?

A ray of light passes from glass into a liquid,as shown in the figure.What is the speed of the light in the liquid? (c = 3.00 × 10⁸ m/s)

Two point charges of +20.0 μC and -8.00 μC are separated by a distance of 20.0 cm.What is the magnitude of electric field due to these charges at a point midway between them? (k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²)

The scalar product of vector = 3.00 + 2) 00 And vector Is 10.0. Which of the following vectors could be vector ?

Exam 1: A: Foundations

A stalled car is being pushed up a hill at constant velocity by three people.The net force on the car is

Consider a uniform solid sphere of radius R and mass M rolling without slipping.Which form of its kinetic energy is larger,translational or rotational?

If the torque on an object adds up to zero

A double-concave lens has equal radii of curvature of 15.1 cm.An object placed 14.2 cm from the lens forms a virtual image 5.29 cm from the lens.What is the index of refraction of the lens material?

When a potential difference of 10 V is placed across a certain solid cylindrical resistor,the current through it is 2 A.If the diameter of this resistor is now tripled,the current will be

Light of wavelength 633 nm from a He-Ne laser passes through a circular aperture and is observed on a screen 4.0 m behind the aperture.The diameter of the central bright area is 5.4 cm.What is the diameter of the aperture?

The electric field 1.5 cm from a very small charged object points toward the object with a magnitude of 180,000 N/C.What is the charge on the object? (k = 1/4πε0 = 8.99 × 109 N • m2/C2)

The current in a wire varies with time according to the equation I(t)= 6.00 A + (4.80 A/s)t,where t is in seconds.How many coulombs of charge pass a cross section of the wire in the time period between t = 0.00 s and t = 3.00 s?

Light of wavelength 575 nm passes through a double-slit and the third order bright fringe is seen at an angle of 6.5° away from the central fringe. What is the separation between the double slits?

A ray of light passes from glass into a liquid,as shown in the figure.What is the speed of the light in the liquid? (c = 3.00 × 108 m/s)

Two point charges of +20.0 μC and -8.00 μC are separated by a distance of 20.0 cm.What is the magnitude of electric field due to these charges at a point midway between them? (k = 1/4πε0 = 8.99 × 109 N • m2/C2)

The scalar product of vector = 3.00 + 2) 00 And vector Is 10.0. Which of the following vectors could be vector ?

The electric field 1.5 cm from a very small charged object points toward the object with a magnitude of 180,000 N/C.What is the charge on the object? (k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²)

A ray of light passes from glass into a liquid,as shown in the figure.What is the speed of the light in the liquid? (c = 3.00 × 10⁸ m/s)

Two point charges of +20.0 μC and -8.00 μC are separated by a distance of 20.0 cm.What is the magnitude of electric field due to these charges at a point midway between them? (k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²)