ElectroMagnetic InductionHard
Question
In figure, the switch S is closed so that a current flows in the iron-core inductor which has inductance L and the resistance R. When the switch is opened. spark is obtained in it at the contacts. The spark is due to
Options
A.a slow flux change in L
B.a sudden increase in the emf of the battery B
C.a rapid flux change in L
D.a rapid flux change in R
Solution
Sudden increase in the e.m.f. cause the spark in the inductor
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