Two identical incandescent light bulbs are connected as shown in figure. When the circuit is connected with an A.C. voltage source of frequency f, which of the following observation will be correct ?

Options

A. Both bulbs will glow alternatively.
B. Both bulbs will glow with same brightness provided `f=1/(2pi) sqrt(1/(LC))`
C. Bulb `b_1` will light up initially and goes off, bulb `b_2` will be on constantly
D. Bulb `b_1` will blink and bulb `b_2` will be on constantly.

Answer

B

Explanation

`f=1/(2pi)sqrt(1/(LC)) rArr omega=1/sqrt(LC)` means resonance takes place, so `omegaL-1/(LC)=0`
`therefore` As only R is present in the circuit, so both bulbs will glow with same brightness.