Materials and Components - Engineering

Q1:

A 200 turn coil has a self inductance of 10 mH. If the number of turns is doubled, all other quantities remaining the same, the self inductance will be

A 2.5 mH

B 5 mH

C 20 mH

D 40 mH

ANS:D - 40 mH

Inductance is proportional to square of number of turns.