In the given circuit, the value of resistance effect of the coil L is exactly equal to the resistance R. Bulbs $B_1$ and $B_2$ are exactly identical. Answer the following questions based on above information:
- Which one of the two bulbs lights up earlier, when key K is closed and why?
- What will be the comparative brightness of the two bulbs after sometime if the key K is kept closed and why?
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- Bulb $B_2$ lights up earlier. The self-induction effect due to coil L in bulb $B_1$ arm does not allow the current to attain maximum value immediately on closing the circuit.
- Since the resistance effect of the coil L is equal to R and the self-induction effect in coil L will disappear after sometime, the current in both the arms will be equal. Hence, both the bulbs will glow with equal brightness after sometime.
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