JEE Main 18 March 2021 Shift 1 Solved Paper

Bandwidth of L−C−R series resonance circuit, β=‌

R

L

As we increase the value of the resistance from lower to the higher of the circuit, the bandwidth of resonance circuit will also increase.
So, the option (a) is correct.
Resonance frequency, ω=‌

1

√LC

Since, the resonance frequency is independent of the resistance.
So, the option (b) is incorrect.
We know that,
Quality factor, Q=‌

ωL

R

The quality factor is inversely proportional to the resistance of the circuit. So, increasing the value of resistance, the quality factor is decreased. So, the option (c) and (d) are incorrect.