LCR Circuits & Resonance: JEE Questions & Solutions

A capacitor C is first charged fully with potential difference of V0 and disconnected from the battery. The charged capacitor is connected…

Using a variable frequency ac voltage source the maximum current measured in the given LCR circuit is 50 mA for V = 5 (100t) The values of…

For the series LCR circuit connected with 220 V, 50 Hz a.c. source as shown in the figure, the power factor is 10. The value of is.

A series LCR circuit is connected to an alternating source of emf E. The current amplitude at resonance frequency is I0. If the value of…

In a series LCR circuit, a resistor of 300, a capacitor of 25 nF, and an inductor of 100 mH are used. For maximum current in the circuit,…

For the AC circuit shown in the figure, R = 100 k and C = 100 pF, and the phase difference between Vin and (VB - VA) is 90^. The input…

An inductor of reactance 100, a capacitor of reactance 50, and a resistor of resistance 50 are connected in series with an AC source of 10…

A series LCR circuit with L = 100 mH, C = 10^-3 F, and R = 10, is connected across an ac source of 220V, 50Hz supply. The power factor of…

A capacitor of capacitance 100 F is charged to a potential of 12 V and connected to a 6.4 mH inductor to produce oscillations. The maximum…

A series L-R circuit connected to an AC source E = 25 (1000t) V has a power factor of 1 2. If the source of emf is changed to E = 20…

A capacitor of reactance 4 3 and a resistor of resistance 4 are connected in series with an AC source of peak value 8 2 V. The power…

In the circuit shown in the figure, the ratio of the quality factor and the bandwidth is s.

In an LC oscillator, if values of inductance and capacitance become twice and eight times, respectively, then the resonant frequency of…

An LCR series circuit of capacitance 62.5 nF and resistance of 50 is connected to an A.C. source of frequency 2.0 kHz. For maximum value of…

A series LCR circuit is connected to an AC source of 220 V, 50 Hz. The circuit contains a resistance R = 80, an inductor of inductive…

For the given figures, choose the correct option:

An inductor of inductance 2 H is connected in series with a resistance, a variable capacitor, and an AC source of frequency 7 kHz. The…

In a series LR circuit with XL = R, the power factor is P1. If a capacitor of capacitance C with XC = XL is added to the circuit, the power…

In the given circuit, rms value of current (Irms) through the resistor R is:

An inductor of 0.5 mH, a capacitor of 20 F, and resistance of 20 are connected in series with a 220 V AC source. If the current is in phase…

A series LCR circuit consists of R = 80, XL = 100, and XC = 40. The input voltage is 2500 (100 t) V. The amplitude of current, in the…

A series LCR circuit is connected to an ac source of 220 V, 50 Hz. The circuit contains a resistance R = 100 and an inductor of inductive…

An oscillating LC circuit consists of a 75 mH inductor and a 1.2 F capacitor. If the maximum charge to the capacitor is 2.7 C. The maximum…

Given below are two statements: Statement I: When the frequency of an a.c. source in a series LCR circuit increases, the current in the…