Published by:
CGP EDU Academic Team
Published on: August 11, 2026
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 self- inductance of the coil:
A
decreases by a factor of 9
B
increases by a factor of 27
C
increases by a factor of 3
D
decreases by a factor of 
Text Solution
Verified by ExpertsThe correct answer is:
C
Total length 
will remain constant
( 
total turns)
And length of winding 
Self inductance 
a
So self inductance will become 3 times.
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