Physics-
General
Easy
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
- the low resistance of P
- the induced-emf in L
- the low resistance of L
- the high voltage of the battery B
The correct answer is: the induced-emf in L
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