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If N is the number of turns in a coil, the value of self-inductance varies as

1. N⁰
2. N
3. N²
4. N³

Correct answer: N²

Solution

The self-inductance of a coil is directly proportional to the square of the number of turns (N²), as it depends on the magnetic flux linkage, which increases with the square of the turns.

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