A copper wire is wound on a wooden... | Electromagnetic Induction

JEE MAIN 2019

11-01-2019 S2

Question

A copper wire is wound on a wooden frame, whose shape is that of an equilateral triangle. If the linear dimension of each side of the frame is increased by a factor of 3, keeping the number of turns of the coil per unit length of the frame the same, then the self inductance of the coil:

Select the correct option:

Increases by a factor of 3

Decreases by a factor of $9 \sqrt{3}$

Decreases by a factor of 9

Increases by a factor of 27

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution