Question

Inductance of a solenoid is 3H and it consists of 500 turns . If number of turn make twice, then the value of self inductance becomes

Answer 1

If we double the number of turn then self induction will increase 4 times.

As shown in the question if we double the number of turns from 500 to 1000 then induction will become four times 3H x4 = 12H