Question

A series LCR circuit having \(R = 44\Omega\), \(L = 2\,\text{H}\) and \(C = 25\mu F\) is connected to a variable frequency of \(220\,\text{V}\). What is the average power transferred to the circuit in one complete cycle if the frequency of supply equals the natural frequency of the circuit?

• A. \(2.1\,\text{kW}\)
• B. \(4.2\,\text{kW}\)
• C. \(1.1\,\text{kW}\)
• D. \(1.2\,\text{kW}\)

Hint:

At resonance in LCR circuit, impedance becomes minimum and equals resistance, so use \(P = \frac{V^2}{R}\).

Answer 1

The Correct Option is C