engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Physics Electromagnetic Oscillations and Alternating Current AC Voltage Applied to a Series LCR Circuit
In an LCR circuit, the current lags the voltage by a phase π/4. If 'f' is the frequency of the applied voltage source, the expression for capacitance 'C' is
1
\(\frac{1}{2\pi f(2\pi fL\: -\:R)}\)
2
\(\frac{1}{\pi f(2\pi fL\: -\:R)}\)
3
\(\frac{1}{\pi f(2\pi fL\: +\:R)}\)
4
\(\frac{1}{2\pi f(2\pi fL\: +\:R)}\)