The reason why a force is required to pull or insert a copper sheet placed in between the poles of an electromagnet .

Question

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Answer 1

Question

Chapter 29, Problem 1DQ

To determine

The reason why a force is required to pull or insert a copper sheet placed in between the poles of an electromagnet.

Expert Solution & Answer

Explanation of Solution

A force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law due to an induced current formed due to the displacement of the sheet.

As per Lenz law, an induced emf gives rise to a current whose magnetic field opposes the cause inducing a change. This can be applied to the given situation.

As per the given data, when the copper sheet is pulled from the poles of electromagnet there will be a change in the magnetic flux. This magnetic flux change induces currents in the copper sheet.

This induced current opposes the change which induces it to flow. That is as per Lenz law, induced current opposes the moving copper sheet which is the primary cause for these currents. Hence there is a difficulty in pulling the copper sheet and thereby requires a force to pull the copper sheet.

A similar sequence arises when we insert a copper sheet between the electromagnet poles. This means there is an induced current due to magnetic flux which in turn is due to this moving copper sheet. Hence, this current opposes the moving of this copper sheet, both insertion and exertion, between two electromagnet poles.

Conclusion:

Thus, a force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law.

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81 SSM Figure 29-84 shows a cross section of an infinite conducting sheet carrying a current per unit x-length of 2; the current emerges perpendicularly out of the page. (a) Use the Biot-Savart law and symmetry to show that for all points B P P. BD P' Figure 29-84 Problem 81. x P above the sheet and all points P' below it, the magnetic field B is parallel to the sheet and directed as shown. (b) Use Ampere's law to prove that B = ½µλ at all points P and P'.

Answer 2

Question

Chapter 29, Problem 1DQ

To determine

The reason why a force is required to pull or insert a copper sheet placed in between the poles of an electromagnet.

Expert Solution & Answer

Explanation of Solution

A force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law due to an induced current formed due to the displacement of the sheet.

As per Lenz law, an induced emf gives rise to a current whose magnetic field opposes the cause inducing a change. This can be applied to the given situation.

As per the given data, when the copper sheet is pulled from the poles of electromagnet there will be a change in the magnetic flux. This magnetic flux change induces currents in the copper sheet.

This induced current opposes the change which induces it to flow. That is as per Lenz law, induced current opposes the moving copper sheet which is the primary cause for these currents. Hence there is a difficulty in pulling the copper sheet and thereby requires a force to pull the copper sheet.

A similar sequence arises when we insert a copper sheet between the electromagnet poles. This means there is an induced current due to magnetic flux which in turn is due to this moving copper sheet. Hence, this current opposes the moving of this copper sheet, both insertion and exertion, between two electromagnet poles.

Conclusion:

Thus, a force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law.

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Answer 3

Question

Chapter 29, Problem 1DQ

To determine

The reason why a force is required to pull or insert a copper sheet placed in between the poles of an electromagnet.

Expert Solution & Answer

Explanation of Solution

A force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law due to an induced current formed due to the displacement of the sheet.

As per Lenz law, an induced emf gives rise to a current whose magnetic field opposes the cause inducing a change. This can be applied to the given situation.

As per the given data, when the copper sheet is pulled from the poles of electromagnet there will be a change in the magnetic flux. This magnetic flux change induces currents in the copper sheet.

This induced current opposes the change which induces it to flow. That is as per Lenz law, induced current opposes the moving copper sheet which is the primary cause for these currents. Hence there is a difficulty in pulling the copper sheet and thereby requires a force to pull the copper sheet.

A similar sequence arises when we insert a copper sheet between the electromagnet poles. This means there is an induced current due to magnetic flux which in turn is due to this moving copper sheet. Hence, this current opposes the moving of this copper sheet, both insertion and exertion, between two electromagnet poles.

Conclusion:

Thus, a force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law.

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Answer 4

Question

Chapter 29, Problem 1DQ

To determine

The reason why a force is required to pull or insert a copper sheet placed in between the poles of an electromagnet.

Expert Solution & Answer

Explanation of Solution

A force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law due to an induced current formed due to the displacement of the sheet.

As per Lenz law, an induced emf gives rise to a current whose magnetic field opposes the cause inducing a change. This can be applied to the given situation.

As per the given data, when the copper sheet is pulled from the poles of electromagnet there will be a change in the magnetic flux. This magnetic flux change induces currents in the copper sheet.

This induced current opposes the change which induces it to flow. That is as per Lenz law, induced current opposes the moving copper sheet which is the primary cause for these currents. Hence there is a difficulty in pulling the copper sheet and thereby requires a force to pull the copper sheet.

A similar sequence arises when we insert a copper sheet between the electromagnet poles. This means there is an induced current due to magnetic flux which in turn is due to this moving copper sheet. Hence, this current opposes the moving of this copper sheet, both insertion and exertion, between two electromagnet poles.

Conclusion:

Thus, a force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law.

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Answer 5

Chapter 29, Problem 1DQ

To determine

The reason why a force is required to pull or insert a copper sheet placed in between the poles of an electromagnet.

Expert Solution & Answer

Explanation of Solution

A force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law due to an induced current formed due to the displacement of the sheet.

As per Lenz law, an induced emf gives rise to a current whose magnetic field opposes the cause inducing a change. This can be applied to the given situation.

As per the given data, when the copper sheet is pulled from the poles of electromagnet there will be a change in the magnetic flux. This magnetic flux change induces currents in the copper sheet.

This induced current opposes the change which induces it to flow. That is as per Lenz law, induced current opposes the moving copper sheet which is the primary cause for these currents. Hence there is a difficulty in pulling the copper sheet and thereby requires a force to pull the copper sheet.

A similar sequence arises when we insert a copper sheet between the electromagnet poles. This means there is an induced current due to magnetic flux which in turn is due to this moving copper sheet. Hence, this current opposes the moving of this copper sheet, both insertion and exertion, between two electromagnet poles.

Conclusion:

Thus, a force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law.

Answer 6

Chapter 29, Problem 1DQ

To determine

The reason why a force is required to pull or insert a copper sheet placed in between the poles of an electromagnet.

Expert Solution & Answer

Explanation of Solution

A force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law due to an induced current formed due to the displacement of the sheet.

As per Lenz law, an induced emf gives rise to a current whose magnetic field opposes the cause inducing a change. This can be applied to the given situation.

As per the given data, when the copper sheet is pulled from the poles of electromagnet there will be a change in the magnetic flux. This magnetic flux change induces currents in the copper sheet.

This induced current opposes the change which induces it to flow. That is as per Lenz law, induced current opposes the moving copper sheet which is the primary cause for these currents. Hence there is a difficulty in pulling the copper sheet and thereby requires a force to pull the copper sheet.

A similar sequence arises when we insert a copper sheet between the electromagnet poles. This means there is an induced current due to magnetic flux which in turn is due to this moving copper sheet. Hence, this current opposes the moving of this copper sheet, both insertion and exertion, between two electromagnet poles.

Conclusion:

Thus, a force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law.

Answer 7

Chapter 29, Problem 1DQ

To determine

The reason why a force is required to pull or insert a copper sheet placed in between the poles of an electromagnet.

Answer 8

Expert Solution & Answer

Explanation of Solution

A force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law due to an induced current formed due to the displacement of the sheet.

As per Lenz law, an induced emf gives rise to a current whose magnetic field opposes the cause inducing a change. This can be applied to the given situation.

As per the given data, when the copper sheet is pulled from the poles of electromagnet there will be a change in the magnetic flux. This magnetic flux change induces currents in the copper sheet.

This induced current opposes the change which induces it to flow. That is as per Lenz law, induced current opposes the moving copper sheet which is the primary cause for these currents. Hence there is a difficulty in pulling the copper sheet and thereby requires a force to pull the copper sheet.

A similar sequence arises when we insert a copper sheet between the electromagnet poles. This means there is an induced current due to magnetic flux which in turn is due to this moving copper sheet. Hence, this current opposes the moving of this copper sheet, both insertion and exertion, between two electromagnet poles.

Conclusion:

Thus, a force is required to pull or insert a copper sheet between the electromagnet poles as per Lenz law.