ElectroMagnetic InductionHard

Question

When a certain circuit consisting of a constant emf E, an inductance L and a resistance R is closed. the current in, it increases with time according to curve 1. After one parameter (E, Lot R) is changed, the increase in current follows curve 2 when the circuit is closed second time. Which parameter was changed : -
                                              

Options

A.L is increased
B.L is decreased
C.R is increased
D.R is decreased

Solution

Here I0 = = constant
⇒ We can′t change E or R.
For curve 2 time constant is more

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