ElectroMagnetic InductionHard
Question
In figure, a lamp P is in series with an iron-core inductor L. When the switch S is closed, the brightness of the lamp rises relatively slowly to its full brightness than it would do without the inductor. This is due to
Options
A.the low resistance of P
B.the induced -emf in L
C.the low resistance of L
D.the high voltage of the battery B
Solution
In absence of L whole emf of B goes on lamp and lamp will glow with full brightness instantaneously but in presence of L some emf is induced in L. Voltage drop on P decrease and brightness ↓
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