Questions
The current through choke coil increases from zero to 6 A in 0.3 seconds and an induced e.m.f. of 30 V is produced. The inductance of the coil of choke is
detailed solution
Correct option is C
|e|=Ldidt⇒30=L×(6-0)0.3⇒L=1.5HTalk to our academic expert!
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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
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