When number of turns of a solenoid is doulbed, its self inductance becomes k time, where k =

Statement I: When the number of turns of a coils is doubled, coefficient of self-inductance of the coil becomes 4 times. Statement II: Self-inductance prop ("number of turns")^(2)

Assertion : When number of turns in a coil is doubled, coefficient of self-inductance of the coil becomes 4 times. Reason : This is because L prop N^(2)

(A): When number of turns in a coil doubled, coefficient of self inductance of the coil becomes four times. (R): Coefficient of self inductance is proportional to the square of number of turns.

The self-inductance of a long straight solenoid is L. Each of the length, the diameter and the number of turns of another solenoid is double that of the first. The self-inductance of the second solenoid is