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Alternating Current — JEE Main & Advanced NSEP PYQs

12 previous year questions from Alternating Current with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

12 questionsNSEPSolutions on every page
1

Circuit A is a series LCR circuit with C_ A =C and L_ A =L . Another circuit B has C_ B =2 C and L_ B =L / 2 . Both the circuits have the same resistance and the capacitor and the

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The impedance (Z) of three electrical components e₁, e₂ and e₃ has frequency (f) dependence as shown by the following three curves. The three components e₁, e₂, e₃ are respectively

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A 10 ohm resistor is connected to a supply voltage alternating between +4 V and -2 V as shown in the following graph. The average power dissipated in the resistor per cycle is

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In a series R-C circuit the supply voltage (V ~s ) is kept constant at 2 V and the frequency f of the sinusoidal voltage is varied from 500 Hz to 2000 Hz . The voltage across the r

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After charging a capacitor C to a potential V , it is connected across an ideal inductor L . The capacitor starts discharging simple harmonically at time t=0 . The charge on the ca

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The same alternating voltage v=V₀ ( t) is applied in both the LCR circuits shown below. The current through the resistance R at resonance is

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In the following circuit the current is in phase with the applied voltage. Therefore, the current in the circuit and the frequency of the source voltage respectively, are

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In a series LCR circuit fed with an alternating emf E=E₀ t ,

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An Alternating Current is expressed as i = i ₁ t + i ₂ t . The RMS value of current is

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In the L R circuit shown in figure, switch S is closed at time t=0 , the charge that passes through the battery of emf E in one time constant is (e being the base of natural logari

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DC emf of 15 V is applied to a circuit containing 5 H inductance and 10 resistance in series at t =0 . The ratio of the currents in the circuit at t=0.5 sec and at t=1.0 sec is

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Impedance of a given series LCR circuit, fed with alternating current, is the same for two frequencies f₁ and f₂ . The resonance frequency f_R of the circuit is

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