The self inductance of a coil is L . Keeping the length and area same, the number of turns in the coil is increased to four times. The self inductance of the coil will now be

Options

A. 4 L
B. 8 L
C. 16 L
D. 12 L

Answer

C

Explanation

`L propn^(2) implies (L_(2))/(L_(1))=(n_(2)^(2))/(n_(1)^(2))" "therefore L_(2)=16L`