1.

If the number of turns per unit length of a coil of solenoid is doubled, the self-inductance of the solenoid will

Answer»

REMAIN unchanged
be halved
be doubled
become four times

Solution :Self inductance of a solenoid `= mu_(0)N^(2)Al`
when n is the NUMBER of turns PER unit length.
So self induction `prop n^(2)`
So inductance becomes 4 times when number of turns per unit length is doubled.


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