A magnet is hung by a string and then placed near a wire as shown. When the switch is closed, the magnet rotates such that the ends of the magnet move as indicated by the arrows. At instant the switch is closed determine: the direction of the current through the wire segment nearest the magnet. Explain. the direction of the net force exerted by the magnet on the wire segment at the instant that the magnet is in the position shown. Explain.

Question

Want to see more full solutions like this?

Answer 1

Textbook Question

Chapter 21.2, Problem 1TH

A magnet is hung by a string and then placed near a wire as shown. When the switch is closed, the magnet rotates such that the ends of the magnet move as indicated by the arrows.

At instant the switch is closed determine:

the direction of the current through the wire segment nearest the magnet. Explain.

Chapter 21.2, Problem 1TH, A magnet is hung by a string and then placed near a wire as shown. When the switch is closed, the

the direction of the net force exerted by the magnet on the wire segment at the instant that the magnet is in the position shown. Explain.

Expert Solution & Answer

To determine

The direction of the current through the wire segment nearest to the magnet and direction of the net force exerted by the magnet on the wire segment at the instant when the magnet is in its normal position with their explanation.

Explanation of Solution

Introduction:

According to Fleming’s right-hand rule, the first finger, second finger and thumb are held at a right angle to each other, then the forefinger will represent the direction of the line of force. The thumb will point the direction of the motion and the second finger will give the direction of the induced current.

The expression of the magnetic force is given by the following expression,

F=ILB

Here, B is the magnitude of the magnetic field and I is the induced current.

Case-1

When the switch is closed, the magnetic north of the magnet moves towards the circuit which implies that the induced current in the wire tends to deflect the magnet towards the right side. With the application of Fleming’s right hand, the anti-clockwise current can produce the magnetic field which is opposite to the magnetic south of the magnet and the direction of the induced current will be in the upward direction. The direction of the current and the magnetic field is shown in Figure 1.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 1

Figure 1

Consider the direction of the current represented by the y axis and the direction of the magnetic field is represented by the negative x direction. The direction of the force of the coil is represented by the z axis which is towards the right of the coil. This can be explained by the diagram shown in Figure 2.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 2

Figure 2

This implies that the direction of the force acting on the wire segment is towards the right.

Conclusion:

Therefore, the direction of the current through the segment near the magnet is up and the direction of the current in the wire is anticlockwise and the direction of the force acting on the wire segment is towards the right.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

01:45

Students have asked these similar questions

Following conventional current flow, what would be the direction of the induced magnetic field and the direction of the current for the two situations, a) right after the switch is closed b) the switch has been closed for a long time and now right after the switch has been opened? See figure below. The figure on the left is a battery connected to a coil. The figure on the right is a coil connected to an amp meter. Determine which direction the amp meter shows current for each situation.

Figure 3 shows a straight wire carrying a current in upwarddirection. The wire is placed near a wire loop. For each case described below, answer the following questions:a. What is the direction of the magnetic flux through theloop?b. Is the magnitude of the flux through the loop increasing ordecreasing with time?c. What is the direction of the magnetic field produced by theinduced current in the loop?d. What is the direction of the current induced in the loop?1. Case 1: The current is increasing.2. Case 2: The current is decreasing.3. Case 3: The current is constant but the loop is being pulledaway from the straight wire.

Two long straight parallel wires are placed 0.25 m apart in a vacuum. Eachwire carries a current of 2.4 A in the same direction. i. Sketch a labelled diagram to show clearly the direction of the force oneach wire ii. Calculate the force per unit length between the wires.

Answer 2

Textbook Question

Chapter 21.2, Problem 1TH

A magnet is hung by a string and then placed near a wire as shown. When the switch is closed, the magnet rotates such that the ends of the magnet move as indicated by the arrows.

At instant the switch is closed determine:

the direction of the current through the wire segment nearest the magnet. Explain.

Chapter 21.2, Problem 1TH, A magnet is hung by a string and then placed near a wire as shown. When the switch is closed, the

the direction of the net force exerted by the magnet on the wire segment at the instant that the magnet is in the position shown. Explain.

Expert Solution & Answer

To determine

The direction of the current through the wire segment nearest to the magnet and direction of the net force exerted by the magnet on the wire segment at the instant when the magnet is in its normal position with their explanation.

Explanation of Solution

Introduction:

According to Fleming’s right-hand rule, the first finger, second finger and thumb are held at a right angle to each other, then the forefinger will represent the direction of the line of force. The thumb will point the direction of the motion and the second finger will give the direction of the induced current.

The expression of the magnetic force is given by the following expression,

F=ILB

Here, B is the magnitude of the magnetic field and I is the induced current.

Case-1

When the switch is closed, the magnetic north of the magnet moves towards the circuit which implies that the induced current in the wire tends to deflect the magnet towards the right side. With the application of Fleming’s right hand, the anti-clockwise current can produce the magnetic field which is opposite to the magnetic south of the magnet and the direction of the induced current will be in the upward direction. The direction of the current and the magnetic field is shown in Figure 1.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 1

Figure 1

Consider the direction of the current represented by the y axis and the direction of the magnetic field is represented by the negative x direction. The direction of the force of the coil is represented by the z axis which is towards the right of the coil. This can be explained by the diagram shown in Figure 2.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 2

Figure 2

This implies that the direction of the force acting on the wire segment is towards the right.

Conclusion:

Therefore, the direction of the current through the segment near the magnet is up and the direction of the current in the wire is anticlockwise and the direction of the force acting on the wire segment is towards the right.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

01:45

Answer 3

Textbook Question

Chapter 21.2, Problem 1TH

A magnet is hung by a string and then placed near a wire as shown. When the switch is closed, the magnet rotates such that the ends of the magnet move as indicated by the arrows.

At instant the switch is closed determine:

the direction of the current through the wire segment nearest the magnet. Explain.

Chapter 21.2, Problem 1TH, A magnet is hung by a string and then placed near a wire as shown. When the switch is closed, the

the direction of the net force exerted by the magnet on the wire segment at the instant that the magnet is in the position shown. Explain.

Expert Solution & Answer

To determine

The direction of the current through the wire segment nearest to the magnet and direction of the net force exerted by the magnet on the wire segment at the instant when the magnet is in its normal position with their explanation.

Explanation of Solution

Introduction:

According to Fleming’s right-hand rule, the first finger, second finger and thumb are held at a right angle to each other, then the forefinger will represent the direction of the line of force. The thumb will point the direction of the motion and the second finger will give the direction of the induced current.

The expression of the magnetic force is given by the following expression,

F=ILB

Here, B is the magnitude of the magnetic field and I is the induced current.

Case-1

When the switch is closed, the magnetic north of the magnet moves towards the circuit which implies that the induced current in the wire tends to deflect the magnet towards the right side. With the application of Fleming’s right hand, the anti-clockwise current can produce the magnetic field which is opposite to the magnetic south of the magnet and the direction of the induced current will be in the upward direction. The direction of the current and the magnetic field is shown in Figure 1.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 1

Figure 1

Consider the direction of the current represented by the y axis and the direction of the magnetic field is represented by the negative x direction. The direction of the force of the coil is represented by the z axis which is towards the right of the coil. This can be explained by the diagram shown in Figure 2.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 2

Figure 2

This implies that the direction of the force acting on the wire segment is towards the right.

Conclusion:

Therefore, the direction of the current through the segment near the magnet is up and the direction of the current in the wire is anticlockwise and the direction of the force acting on the wire segment is towards the right.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

01:45

Answer 4

Textbook Question

Chapter 21.2, Problem 1TH

A magnet is hung by a string and then placed near a wire as shown. When the switch is closed, the magnet rotates such that the ends of the magnet move as indicated by the arrows.

At instant the switch is closed determine:

the direction of the current through the wire segment nearest the magnet. Explain.

Chapter 21.2, Problem 1TH, A magnet is hung by a string and then placed near a wire as shown. When the switch is closed, the

the direction of the net force exerted by the magnet on the wire segment at the instant that the magnet is in the position shown. Explain.

Expert Solution & Answer

To determine

The direction of the current through the wire segment nearest to the magnet and direction of the net force exerted by the magnet on the wire segment at the instant when the magnet is in its normal position with their explanation.

Explanation of Solution

Introduction:

According to Fleming’s right-hand rule, the first finger, second finger and thumb are held at a right angle to each other, then the forefinger will represent the direction of the line of force. The thumb will point the direction of the motion and the second finger will give the direction of the induced current.

The expression of the magnetic force is given by the following expression,

F=ILB

Here, B is the magnitude of the magnetic field and I is the induced current.

Case-1

When the switch is closed, the magnetic north of the magnet moves towards the circuit which implies that the induced current in the wire tends to deflect the magnet towards the right side. With the application of Fleming’s right hand, the anti-clockwise current can produce the magnetic field which is opposite to the magnetic south of the magnet and the direction of the induced current will be in the upward direction. The direction of the current and the magnetic field is shown in Figure 1.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 1

Figure 1

Consider the direction of the current represented by the y axis and the direction of the magnetic field is represented by the negative x direction. The direction of the force of the coil is represented by the z axis which is towards the right of the coil. This can be explained by the diagram shown in Figure 2.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 2

Figure 2

This implies that the direction of the force acting on the wire segment is towards the right.

Conclusion:

Therefore, the direction of the current through the segment near the magnet is up and the direction of the current in the wire is anticlockwise and the direction of the force acting on the wire segment is towards the right.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

01:45

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

To determine

The direction of the current through the wire segment nearest to the magnet and direction of the net force exerted by the magnet on the wire segment at the instant when the magnet is in its normal position with their explanation.

Explanation of Solution

Introduction:

According to Fleming’s right-hand rule, the first finger, second finger and thumb are held at a right angle to each other, then the forefinger will represent the direction of the line of force. The thumb will point the direction of the motion and the second finger will give the direction of the induced current.

The expression of the magnetic force is given by the following expression,

F=ILB

Here, B is the magnitude of the magnetic field and I is the induced current.

Case-1

When the switch is closed, the magnetic north of the magnet moves towards the circuit which implies that the induced current in the wire tends to deflect the magnet towards the right side. With the application of Fleming’s right hand, the anti-clockwise current can produce the magnetic field which is opposite to the magnetic south of the magnet and the direction of the induced current will be in the upward direction. The direction of the current and the magnetic field is shown in Figure 1.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 1

Figure 1

Consider the direction of the current represented by the y axis and the direction of the magnetic field is represented by the negative x direction. The direction of the force of the coil is represented by the z axis which is towards the right of the coil. This can be explained by the diagram shown in Figure 2.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 2

Figure 2

This implies that the direction of the force acting on the wire segment is towards the right.

Conclusion:

Therefore, the direction of the current through the segment near the magnet is up and the direction of the current in the wire is anticlockwise and the direction of the force acting on the wire segment is towards the right.

Answer 8

Expert Solution & Answer

To determine

The direction of the current through the wire segment nearest to the magnet and direction of the net force exerted by the magnet on the wire segment at the instant when the magnet is in its normal position with their explanation.

Explanation of Solution

Introduction:

According to Fleming’s right-hand rule, the first finger, second finger and thumb are held at a right angle to each other, then the forefinger will represent the direction of the line of force. The thumb will point the direction of the motion and the second finger will give the direction of the induced current.

The expression of the magnetic force is given by the following expression,

F=ILB

Here, B is the magnitude of the magnetic field and I is the induced current.

Case-1

When the switch is closed, the magnetic north of the magnet moves towards the circuit which implies that the induced current in the wire tends to deflect the magnet towards the right side. With the application of Fleming’s right hand, the anti-clockwise current can produce the magnetic field which is opposite to the magnetic south of the magnet and the direction of the induced current will be in the upward direction. The direction of the current and the magnetic field is shown in Figure 1.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 1

Figure 1

Consider the direction of the current represented by the y axis and the direction of the magnetic field is represented by the negative x direction. The direction of the force of the coil is represented by the z axis which is towards the right of the coil. This can be explained by the diagram shown in Figure 2.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 2

Figure 2

This implies that the direction of the force acting on the wire segment is towards the right.

Conclusion:

Therefore, the direction of the current through the segment near the magnet is up and the direction of the current in the wire is anticlockwise and the direction of the force acting on the wire segment is towards the right.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

To determine

The direction of the current through the wire segment nearest to the magnet and direction of the net force exerted by the magnet on the wire segment at the instant when the magnet is in its normal position with their explanation.

Answer 12

Explanation of Solution

Introduction:

According to Fleming’s right-hand rule, the first finger, second finger and thumb are held at a right angle to each other, then the forefinger will represent the direction of the line of force. The thumb will point the direction of the motion and the second finger will give the direction of the induced current.

The expression of the magnetic force is given by the following expression,

F=ILB

Here, B is the magnitude of the magnetic field and I is the induced current.

Case-1

When the switch is closed, the magnetic north of the magnet moves towards the circuit which implies that the induced current in the wire tends to deflect the magnet towards the right side. With the application of Fleming’s right hand, the anti-clockwise current can produce the magnetic field which is opposite to the magnetic south of the magnet and the direction of the induced current will be in the upward direction. The direction of the current and the magnetic field is shown in Figure 1.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 1

Figure 1

Consider the direction of the current represented by the y axis and the direction of the magnetic field is represented by the negative x direction. The direction of the force of the coil is represented by the z axis which is towards the right of the coil. This can be explained by the diagram shown in Figure 2.

Tutorials in Introductory Physics, Chapter 21.2, Problem 1TH , additional homework tip 2

Figure 2

This implies that the direction of the force acting on the wire segment is towards the right.

Conclusion:

Therefore, the direction of the current through the segment near the magnet is up and the direction of the current in the wire is anticlockwise and the direction of the force acting on the wire segment is towards the right.

Answer 13

Ch. 21.1 - Based on your experience with electric field...Ch. 21.1 - Carefully draw the magnetic field lines for the...Ch. 21.1 - Based on the magnetic field lines you have drawn,...Ch. 21.1 - Two identical magnets are placed as shown. Using...Ch. 21.1 - To which of your three classes from section I of...Ch. 21.1 - To which of your three classes could bar 2 belong?...Ch. 21.1 - Would end 2A attract, repel, or neither attract...Ch. 21.2 - A magnet is hung by a string and then placed near...Ch. 21.2 - Draw a vector on the diagram to show the direction...Ch. 21.2 - Suppose that a third wire, carrying another...

Concept explainers

Videos

Explanation of Solution

Want to see more full solutions like this?

Chapter 21 Solutions

Additional Science Textbook Solutions