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.

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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.

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01:45

Students have asked these similar questions

A loop of wire is horizontal. A bar magnet is pushed toward the loop from below, along the axis of the loop, as shown.a. In what direction is the current in the loop? Explain.b. Is there a magnetic force on the loop? If so, in which direction? Explain.Hint: Recall that a current loop is a magnetic dipole.c. Is there a magnetic force on the magnet? If so, in which direction?

The figure below shows a top view of two conducting rails on which a conducting bar can slide. A uniform magnetic field is directed perpendicular to the plane of the figure as shown. A battery is to beconnected to the two rails so that when the switch is closed, current will flow through the bar and cause a magnetic force to push the bar to the right. In which orientation, A or B, should the battery be placedin the circuit? Hint: Use the right hand rule for the formula.

A square loop (each side is 10 cm) of wire with Resistance 100Ω is moved at a constant speed of 30cm/s across a uniform magnetic field 2 T, confined in a square region (Each side of the square is 20cm). (a) Graph the force needed to move the loop at a constant speed from -20 cm to 20cm (as shown in the figure). What will be the maximum force required? Assume that the force pointing to the right as positive (b) Graph the current induced in the loop as a function of distance from -20cm to 20cm. Assume clockwise current to be positive. What will be the maximum value of current? Hint: The figure is drawn not to scale

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.

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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.

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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

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