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 sin(100t) The values…

For the series LCR circuit connected with 220 V, 50 Hz a.c. source as shown in the figure, the power factor is α/10. The value of α 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 Ω, 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 kΩ and C = 100 pF, and the phase difference between Vᵢₙ and (V_B - V_A) is 90^°. The input…

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

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

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

A series L-R circuit connected to an AC source E = 25 sin(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 Ω and a resistor of resistance 4 Ω 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 Ω is connected to an A.C. source of frequency 2.0 kHz. For maximum value…

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

For the given figures, choose the correct option:

An inductor of inductance 2 μ 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 X_L = R, the power factor is P₁. If a capacitor of capacitance C with X_C = X_L is added to the circuit, the…

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

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

A series LCR circuit consists of R = 80 Ω, X_L = 100 Ω, and X_C = 40 Ω. The input voltage is 2500 cos(100 π t) V. The amplitude of current,…

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

An oscillating LC circuit consists of a 75 mH inductor and a 1.2 μF capacitor. If the maximum charge on the capacitor is 2.7 μC, the…

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…