Question

A solenoid wound over rectangular frame. If all the linear dimensions of the frame increased by a factor 3 and the number of turns per unit length remains the same, the self inductance increased by a factor of

Answer 1

Question

A solenoid wound over rectangular frame. If all the linear dimensions of the frame increased by a factor 3 and the number of turns per unit length remains the same, the self inductance increased by a factor of

Answer

we have  L=u N^2A/l

so area will be increased by 9 times and length by 3 time so total will be increased  by 3 time

hope it is helpful

Answer 2

Answer:

63

Explanation:

L=μοN²A.dI/l

here number of turns of the solenoid per unit length is constant.

if we use the formula μoμrN²AI / l.

μ value is 4×10∧-7.

so L = 4×10∧-7 × 4×10∧-7 ×N²×3A×3i ÷ L

126/2=63