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Self Induction

If inductance...

Question

If inductance per unit length for a solenoid near its centre and near the end is denoted by $L_{M}$ and $L_{e}$

L_{M} < L_{e}

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L_{M} > L_{e}

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L_{M} = L_{e}

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L_{M} > 1 > L_{e}

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Solution

The correct option is D $L_{M} > L_{e}$
Magnitude of induced flux is higher at the center than at the edges.
Therefore the flux linkage per unit current ( which is equal to inductance) is higher at the center than at the edges.
Therefore, $L_{M} > L_{e}$

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