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Standard XII

Physics

Using Lenz's Law

BAR magnet is...

Question

BAR magnet is moving along the axis of a loop & towards it as shown in the figure.

V_{A} - V_{B}

is negative

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V_{A} - V_{B}

is zero

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V_{A} - V_{B}

is positive

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No current in the loop

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Solution

The correct option is C $V_{A} - V_{B}$ is positive
The field into the loop is increasing towards right. So, the current induced in the loop will be in clockwise direction when viewed from the resistor AB. So, curernt flows from A to B. So, $V_{A} - V_{B}$ is positive.

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BAR magnet is moving along the axis of a loop & towards it as shown in the figure.

The correct option is C VA−VB is positiveThe field into the loop is increasing towards right. So, the current induced in the loop will be in clockwise direction when viewed from the resistor AB. So, curernt flows from A to B. So, VA−VB is positive.

The correct option is C $V_{A} - V_{B}$ is positive
The field into the loop is increasing towards right. So, the current induced in the loop will be in clockwise direction when viewed from the resistor AB. So, curernt flows from A to B. So, $V_{A} - V_{B}$ is positive.