A coil is wound as a transformer of rectangular cross-section. If all the linear dimensions of the transformer are increased by a factor 2 and the number of turns per unit length of the coil remain the same, the self-inductance increased by a factor of
Text Solution
Verified by ExpertsThe correct answer is:
C
We have, self inductance,
Given, 
is constant, doubling the length would double n also. Besides this, area would become four times on doubling linear dimensions.
So, 
Here, 
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