In circular coil, when no. of turns is doubled and resistance becomes `(1)/(4)th` of initial, then inductance becomes

Options

A. 4 times
B. 2 times
C. 8 times
D. no change

Answer

A

Explanation

`L prop N^(2)`
So, when number of turns is doubled L' will become 4 times of L, i.e., L' = 4L or 4 times.