Question

If the number of turns in a coil is N then the value of self inductance of the coil will become

• A. N times
• B. N${}^2$ times
• C. N${}^{-2}$ times
• D. N${}^o$ times

Answer 1

Answer: (B)

N${}^2$ times

Self inductance of coil is directly proportional to square of number of turns.

Self-induction of a coil, $L={\mu }_o\pi \frac{n^{2}R}{2}$