In a car spark coil an e.m.f. of `40000` volts is induced in a secondary when the primary current
Channel: Doubtnut
Date: 2020-05-31

In a car spark coil an e.m.f. of `40000` volts is induced in a secondary when the primary current changes from `4A` to `0` in `10 mu s`. The mutual inductance between the primary and secondary winding of this spark coil is `(nxx(1)/(10))` henry, then `n=`