Materials and Components - Engineering

Q1:

A single layer air cored coil has n turns and inductance L. If a new coil is formed by having 2n turns while keeping the coil length and diameter the same, the new inductance is

A 0.5 L

B L

C 2 L

D 4 L

ANS:D - 4 L

Inductance is proportional to square of number of turns.