List of top Physics Questions on LCR Circuit asked in COMEDK UGET

In a given circuit, the instantaneous values of alternating voltage and current are $V = 5 \sin(80\pi t + \pi)$ volts and $I = 5 \sin(80\pi t)$ amperes respectively. Find the average power consumed in the circuit.

A source of alternating emf $e = \varepsilon_0 \sin(\omega t)$ is connected to a pure capacitor. Then the instantaneous current in the circuit is:

The instantaneous values of alternating current and voltages in a circuit are \(I = \frac{3}{\sqrt{2}} \sin(200\pi t)\) ampere and \(V = \frac{3}{\sqrt{2}} \sin\left(200\pi t + \frac{\pi}{6}\right)\) volt. What is the average power consumed in the circuit in watt?

In a pure inductive circuit, a sinusoidal voltage \(V(t) = 200 \sin 250t\) is applied to a pure inductance of \(L = 0.02\,\text{H}\). The current through the coil is:

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?

What should be the value of the inductance of the coil which is to be connected to \( 220 \, V, 50 \, Hz \) supply so that maximum current of \( 3\sqrt{2} \, A \) flows through the circuit?

In which of the following circuit do we find the current and voltage in phase?

An LCR series ac circuit is at resonance with \(10\,V\) each across \(L\), \(C\) and \(R\). If the resistance is halved, the respective voltage across \(R\), \(C\) and \(L\) are

Quality factor of a series $LCR$ circuit decreases from 3 to 2. Resonant frequency is $600 \, Hz$. Change in band width is

Power factor of a series $LCR $ circuit is