A circular coil with its plane vertical is released from rest- It enters a region of a uniform magnetic field B at time t - t 1 and leaves the region at time t - t 2 - The acceleration of the coil isCoxxA- Less than g for all values of t-B- Equal to g for all values of t-C- Equal to g before t - t 1 and after t - t 2 but less than g between t 1 and t 2D- Less than g when it is entering the field and when it is leaving the field-

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Standard XII

Physics

Alternating Current

A circular co...

Question

A circular coil with its plane vertical is released from rest. It enters a region of a uniform magnetic field B at time $t = t_{1}$ and leaves the region at time $t = t_{2}$ . The acceleration of the coil is

Less than g for all values of t.

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Equal to g for all values of t.

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Equal to g before

t = t_{1}

and after

t = t_{2}

but less than g between

t_{1}

and

t_{2}

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Less than g when it is entering the field and when it is leaving the field.

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Solution

The correct option is D Less than g when it is entering the field and when it is leaving the field.
When it is completely inside the field the flux remains constant but it changes at the time of entry and exit. This is opposed (Lenz’s law).

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A circular coil with its plane vertical is released from rest. It enters a region of a uniform magnetic field B at time t=t1 and leaves the region at time t=t2. The acceleration of the coil is

The correct option is D Less than g when it is entering the field and when it is leaving the field.When it is completely inside the field the flux remains constant but it changes at the time of entry and exit. This is opposed (Lenz’s law).

A circular coil with its plane vertical is released from rest. It enters a region of a uniform magnetic field B at time $t = t_{1}$ and leaves the region at time $t = t_{2}$ . The acceleration of the coil is

The correct option is D Less than g when it is entering the field and when it is leaving the field.
When it is completely inside the field the flux remains constant but it changes at the time of entry and exit. This is opposed (Lenz’s law).