Question

An inductor L, a resistor R and two identical bulbs B₁ and B₂ are connected to a battery through a switch S as shown in the figure. The resistance of the coil having inductance L is also R. Which of the following statement gives the correct description of the happening when the switch S is closed?

(A) The bulb B₂ lights up earlier then B₁ and finally both the bulbs shine equally bright. 

(B) B₁ lights up earlier and finally both the bulbs acquire brightness. 

(C) B₂ lights up earlier and finally B₁ shines brighter than B₂.

(D) B₁ and B₂ lights up together with equal brightness all the time.

Answer 1

Correct option is (A) The bulb B₂ lights up earlier then B₁ and finally both the bulbs shine equally bright. 

At t = 0;

At t = ∞;

Hence B₂ lights up early; but finally both B₁ and B₂ shine with equal brightness.