Which of the following are independent of circuit voltage?

1. Current

2. Bandwidth

3. Quality factor

4. Resonant frequency 

The correct answer is option 1):(2, 3 and 4 )

Concept:

Current:

• The current across the conductor  is proportional voltage

V = I R

Bandwidth

• The bandwidth of the rlc circuit is defined as the range of frequencies for which circuit output voltage (or) current value equals 70.7 % of its maximum amplitude, which will occur at the resonant frequency
• It is independent of Voltage

Quality factor

• Quality factor is a ratio of resonant frequency to bandwidth and the higher the circuit Q, the smaller the bandwidth.
• It is independent of Voltage

Resonant frequency:

• Resonant frequency is the natural frequency where a medium vibrates at the highest amplitude. Resonant frequency is usually denoted as f₀.
• It is independent of Voltage
• Hence option 1 is correct