Questions
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
detailed solution
Correct option is C
Self inductance L=μ0N2A/l=μ0n2lAWhere n is the number of turns per unit length and N is the total number of turns and N=nlIn the given question n is same. A is increased 4 times and l is increased 2 times and hence L will be increased 8 times.Talk to our academic expert!
Similar Questions
Two different coils have self-inductance mH, . The current in one coil is increased at a constant rate. The current in the second coil is also increased at the same rate. At a certain instant of time, the power given to the two coils is the same. At that time the current, the induced voltage and the energy stored in the first coil are and respectively. Corresponding values for the second coil at the same instant are and respectively. Then
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