Question 1

A proton, moving west, enters a magnetic field of a certain strength. Because of this magnetic field the proton curves upward. What is the direction of this magnetic field?

Accepted Answer

A)  towards the west 
B)  towards the east 
C)  towards the south 
D)  towards the north 
E)  downward 
A)  towards the west 
B)  towards the east 
C)  towards the south 
D)  towards the north 
E)  downward

Question 2

Which of the following statements is correct?

Accepted Answer

A)  Earth's geographic north pole is the north pole of the Earth's magnetic field. 
B)  Earth's geographic south pole is the south pole of the Earth's magnetic field. 
C)  The north pole of a magnet points towards the Earth's geographic north pole. 
D)  The north pole of a magnet points towards the Earth's geographic south pole. 
E)  None of the above statements is correct.. 
A)  Earth's geographic north pole is the north pole of the Earth's magnetic field. 
B)  Earth's geographic south pole is the south pole of the Earth's magnetic field. 
C)  The north pole of a magnet points towards the Earth's geographic north pole. 
D)  The north pole of a magnet points towards the Earth's geographic south pole. 
E)  None of the above statements is correct..

Question 3

A charged particle traveling opposite to a magnetic field does not experience a magnetic force.

Accepted Answer

A) True 
 B)False

Question 4

A circular loop of wire of cross-sectional area 0.12 m2 consists of 200. turns, each carrying 0.50 A. It is placed in a magnetic field of 0.050 T oriented at 30° to the plane of the loop. What torque acts on the loop?

Accepted Answer

Question 5

The magnetic field unlike the electric field is continuous.

Accepted Answer

A) True 
 B)False

Question 6

A stationary proton is in a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the proton?

Accepted Answer

A)  zero 
B)  1.6 × 10-20 N 
C)  3.2 × 10-20 N 
D)  1.6 × 10-21 N 
E)  3.2 × 10-21 N 
A)  zero 
B)  1.6 × 10-20 N 
C)  3.2 × 10-20 N 
D)  1.6 × 10-21 N 
E)  3.2 × 10-21 N

Question 7

The magnetic field at a distance of 2 cm from a current carrying wire is 4 μT. What is the magnetic field at a distance of 4 cm from the wire?

Accepted Answer

A)  2 μT 
B)  4 μT 
C)  6 μT 
D)  8 μT 
E)  10 μT 
A)  2 μT 
B)  4 μT 
C)  6 μT 
D)  8 μT 
E)  10 μT

Question 8

An electron, moving south, enters a magnetic field of certain strength. Because of this field the electron curves upward. What is the direction of the magnetic field?

Accepted Answer

A)  downward 
B)  towards the east 
C)  upward 
D)  towards the west 
E)  towards the north 
A)  downward 
B)  towards the east 
C)  upward 
D)  towards the west 
E)  towards the north

Question 9

A wire, 0.60 m in length, is carrying a current of 2.0 A and is placed at a certain angle with respect to the magnetic field of strength 0.30 T. If the wire experiences a force of 0.18 N, what angle does the wire make with respect to the magnetic field?

Accepted Answer

A)  20° 
B)  25° 
C)  30° 
D)  35° 
E)  60° 
A)  20° 
B)  25° 
C)  30° 
D)  35° 
E)  60°

Question 10

A rectangular coil carrying a current in a magnetic field will experience a net torque that will cause the coil to rotate in that field, if the field is not along the coil axis.

Accepted Answer

A) True 
 B)False

Question 11

A solenoid with a certain number of turns N and carrying a current of 2.000 A has a length of 34.00 cm. If the magnitude of the magnetic field generated at the center of the solenoid is 9.000 mT, what is the value of N?

Accepted Answer

A)  860.0 
B)  1591 
C)  2318 
D)  3183 
E)  1218 
A)  860.0 
B)  1591 
C)  2318 
D)  3183 
E)  1218

Question 12

FIGURE 22-7  
-A wire in the shape of an "M" lies in the plane of the paper. It carries a current of 2.0 A, flowing from A to E. It is placed in a uniform magnetic field of 0.55 T in the same plane, directed as shown in Figure 22-7. What is the magnitude and direction of the force acting on section CD of this wire?

Accepted Answer

A)  0.070 N perpendicular into the page 
B)  0.40 N perpendicular out of the page 
C)  0.070 N perpendicular out of the page 
D)  0.40 N perpendicular into the page 
E)  0.20 N perpendicular out of the page 
A)  0.070 N perpendicular into the page 
B)  0.40 N perpendicular out of the page 
C)  0.070 N perpendicular out of the page 
D)  0.40 N perpendicular into the page 
E)  0.20 N perpendicular out of the page

Question 13

A proton is to orbit Earth at the equator using Earth's magnetic field to supply part of the necessary centripetal force. In what direction should the proton move?

Accepted Answer

A)  upward 
B)  northward 
C)  southward 
D)  eastward 
E)  westward 
A)  upward 
B)  northward 
C)  southward 
D)  eastward 
E)  westward

Question 14

FIGURE 22-3  
-A rectangular coil, with corners labeled ABCD, of length L and width w is placed in a magnetic field B as shown in Figure 22-3. If there is a current I flowing through this coil, what is the direction of the force acting on section CD of this coil?

Accepted Answer

A)  perpendicular to and into the page 
B)  perpendicular to and out of the page 
C)  in the direction of the magnetic field 
D)  in the opposite direction of the magnetic field 
E)  none 
A)  perpendicular to and into the page 
B)  perpendicular to and out of the page 
C)  in the direction of the magnetic field 
D)  in the opposite direction of the magnetic field 
E)  none

Question 15

An electric field makes a charged particle accelerate but a magnetic field takes it around in a circle.

Accepted Answer

A) True 
 B)False

Question 16

A current carrying wire placed in a magnetic field perpendicular to the wire experiences a maximum force.

Accepted Answer

A) True 
 B)False

Question 17

FIGURE 22-4  
-When the switch is closed in the circuit shown in the sketch in Figure 22-4, the wire between the poles of the horseshoe magnet deflects upward. From this you can conclude that the left end of the magnet is

Accepted Answer

A)  not contributing to the wire's deflection. 
B)  a north magnetic pole. 
C)  a south magnetic pole. 
D)  a magnetic monopole. 
E)  a magnetic dipole. 
A)  not contributing to the wire's deflection. 
B)  a north magnetic pole. 
C)  a south magnetic pole. 
D)  a magnetic monopole. 
E)  a magnetic dipole.

Question 18

FIGURE 22-9  
-A long straight wire carrying a 4-A current is placed along the x-axis as shown in Figure 22-9. What is the magnitude of the magnetic field at a point P, located at y = 0.02 m, due to the current in this wire?

Accepted Answer

A)  20 μT 
B)  30 μT 
C)  40 μT 
D)  50 μT 
E)  60 μT 
A)  20 μT 
B)  30 μT 
C)  40 μT 
D)  50 μT 
E)  60 μT

Question 19

FIGURE 22-7  
-A wire in the shape of an "M" lies in the plane of the paper. It carries a current of 2.0 A, flowing from A to E. It is placed in a uniform magnetic field of 0.85 T in the same plane, directed as shown in Figure 22-7. What is the magnitude and direction of the force acting on the wire?

Accepted Answer

A)  0.40 N perpendicular out of the page 
B)  0.10 N perpendicular into the page 
C)  0.40 N perpendicular into the page 
D)  0.10 N perpendicular out of the page 
E)  0.20 N perpendicular out of the page 
A)  0.40 N perpendicular out of the page 
B)  0.10 N perpendicular into the page 
C)  0.40 N perpendicular into the page 
D)  0.10 N perpendicular out of the page 
E)  0.20 N perpendicular out of the page

Question 20

FIGURE 22-2  
-A rectangular coil, with corners labeled ABCD, of length L and width w is placed in a magnetic field B as shown in Figure 22-2. If there is no current flowing through the coil, what is the force acting on section AB of the coil?

Accepted Answer

A)  ILB sinθ 
B)  ILB cos θ 
C)  ILB 
D)  0 N 
E)  None of the other answers is correct. 
A)  ILB sinθ 
B)  ILB cos θ 
C)  ILB 
D)  0 N 
E)  None of the other answers is correct.

Exam 22: Magnetism

A proton, moving west, enters a magnetic field of a certain strength. Because of this magnetic field the proton curves upward. What is the direction of this magnetic field?

Which of the following statements is correct?

A charged particle traveling opposite to a magnetic field does not experience a magnetic force.

A circular loop of wire of cross-sectional area 0.12 m2 consists of 200. turns, each carrying 0.50 A. It is placed in a magnetic field of 0.050 T oriented at 30° to the plane of the loop. What torque acts on the loop?

The magnetic field unlike the electric field is continuous.

A stationary proton is in a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the proton?

The magnetic field at a distance of 2 cm from a current carrying wire is 4 μT. What is the magnetic field at a distance of 4 cm from the wire?

An electron, moving south, enters a magnetic field of certain strength. Because of this field the electron curves upward. What is the direction of the magnetic field?

A wire, 0.60 m in length, is carrying a current of 2.0 A and is placed at a certain angle with respect to the magnetic field of strength 0.30 T. If the wire experiences a force of 0.18 N, what angle does the wire make with respect to the magnetic field?

A rectangular coil carrying a current in a magnetic field will experience a net torque that will cause the coil to rotate in that field, if the field is not along the coil axis.

A solenoid with a certain number of turns N and carrying a current of 2.000 A has a length of 34.00 cm. If the magnitude of the magnetic field generated at the center of the solenoid is 9.000 mT, what is the value of N?

A proton is to orbit Earth at the equator using Earth's magnetic field to supply part of the necessary centripetal force. In what direction should the proton move?

FIGURE 22-3 -A rectangular coil, with corners labeled ABCD, of length L and width w is placed in a magnetic field B as shown in Figure 22-3. If there is a current I flowing through this coil, what is the direction of the force acting on section CD of this coil?

An electric field makes a charged particle accelerate but a magnetic field takes it around in a circle.

A current carrying wire placed in a magnetic field perpendicular to the wire experiences a maximum force.

FIGURE 22-4 -When the switch is closed in the circuit shown in the sketch in Figure 22-4, the wire between the poles of the horseshoe magnet deflects upward. From this you can conclude that the left end of the magnet is

FIGURE 22-9 -A long straight wire carrying a 4-A current is placed along the x-axis as shown in Figure 22-9. What is the magnitude of the magnetic field at a point P, located at y = 0.02 m, due to the current in this wire?

FIGURE 22-7 -A wire in the shape of an "M" lies in the plane of the paper. It carries a current of 2.0 A, flowing from A to E. It is placed in a uniform magnetic field of 0.85 T in the same plane, directed as shown in Figure 22-7. What is the magnitude and direction of the force acting on the wire?

FIGURE 22-2 -A rectangular coil, with corners labeled ABCD, of length L and width w is placed in a magnetic field B as shown in Figure 22-2. If there is no current flowing through the coil, what is the force acting on section AB of the coil?

Introduction to Physics

One-Dimensional Kinematics

Vectors in Physics

Two-Dimensional Kinematics

Newtons Laws of Motion

Applications of Newtons Laws

Work and Kinetic Energy

Potential Energy and Conservation of Energy

Linear Momentum and Collisions

Rotational Kinematics and Energy

Rotational Dynamics and Static Equilibrium

Gravity

Oscillations About Equilibrium

Waves and Sound

Fluids

Temperature and Heat

Phases and Phase Changes

The Laws of Thermodynamics

Electric Charges, Forces, and Fields

Electric Potential and Electric Potential Energy

Electric Current and Direct-Current Circuits

Magnetic Flux and Faradays Law of Induction

Alternating-Current Circuits

Electromagnetic Waves

Geometrical Optics

Optical Instruments

Physical Optics: Interference and Diffraction

Relativity

Quantum Physics

Atomic Physics

Nuclear Physics and Nuclear Radiation

Filters

A circular loop of wire of cross-sectional area 0.12 m² consists of 200. turns, each carrying 0.50 A. It is placed in a magnetic field of 0.050 T oriented at 30° to the plane of the loop. What torque acts on the loop?