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AC Circuits

MHT-CET Physics. Try each one first, then open its answer.

Top 10 MHT-CET PYQs to practise first

The questions and kinds of question asked most often come first. Each one says how often and in which papers.

  1. Question 1

    This type asked 12 times: 9 May 2023 S2, 10 May 2023 S1, 13 May 2024 S2, 19 Apr 2025 S2, 20 Apr 2025 S2, 21 Apr 2025 S1, 26 Apr 2025 S2, 11 Apr 2026 S1, 11 Apr 2026 S2, 19 Apr 2026 S2, 12 May 2026 S1, 19 May 2026 S1. This one: 19 May 2026 S1 See all 12 of this type

    137
    An inductor of inductance LL and a resistor of resistance RR are joined in series and connected to an a.c. source of frequency ω\omega. The power dissipated in the circuit is

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  2. Question 2

    This type asked 10 times: 2 May 2023 S1, 16 May 2023 S1, 19 Apr 2025 S1, 22 Apr 2025 S2, 13 Apr 2026 S1, 16 Apr 2026 S1, 14 May 2026 S1, 14 May 2026 S2, 15 May 2026 S2, 19 May 2026 S1. This one: 19 May 2026 S1 See all 10 of this type

    138
    An alternating voltage is given by V=V0sin⁡(ωt+π4)V = V_0\sin\left(\omega t + \dfrac{\pi}{4}\right). The time when the voltage is maximum for the first time is (TT = periodic time of the alternating voltage, cos⁡0∘=sin⁡90∘=1\cos 0^\circ = \sin 90^\circ = 1)

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  3. Question 3

    This type asked 10 times: 10 May 2024 S1, 14 May 2024 S2, 19 Apr 2025 S1, 19 Apr 2025 S2, 22 Apr 2025 S1, 25 Apr 2025 S1, 13 Apr 2026 S2, 15 Apr 2026 S1, 18 Apr 2026 S1, 13 May 2026 S2. This one: 13 May 2026 S2 See all 10 of this type

    138
    In an a.c. circuit, if the power factor changes from 0.50.5 to 0.250.25 then the increase in impedance is

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  4. Question 4

    This type asked 10 times: 4 May 2023 S1, 15 May 2023 S2, 16 May 2023 S2, 20 Apr 2025 S2, 22 Apr 2025 S1, 26 Apr 2025 S1, 13 Apr 2026 S1, 16 Apr 2026 S2, 12 May 2026 S1, 13 May 2026 S1. This one: 13 May 2026 S1 See all 10 of this type

    137
    What is the value of inductance L for which the current is maximum in series LCR circuit with C=10 μC = 10\ \muF and ω=1000\omega = 1000/s ?

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  5. Question 5

    This type asked 9 times: 4 May 2023 S2, 9 May 2023 S1, 10 May 2023 S1, 10 May 2023 S2, 20 Apr 2025 S1, 15 Apr 2026 S2, 17 Apr 2026 S1, 15 May 2026 S1, 19 May 2026 S2. This one: 19 May 2026 S2 See all 9 of this type

    138
    To reduce the resonant frequency in an L-C-R series circuit with a generator,

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  6. Question 6

    This type asked 9 times: May 2022 S1, 3 May 2023 S1, 3 May 2023 S2, 14 May 2024 S2, 19 Apr 2025 S1, 19 Apr 2026 S1, 13 May 2026 S2, 15 May 2026 S1, 15 May 2026 S2. This one: 15 May 2026 S2 See all 9 of this type

    139
    An alternating voltage V=2002sin⁡(100t)V = 200\sqrt{2}\sin(100t) volt is connected to 1 μF1\,\mu F capacitor through ammeter (AC). The reading of ammeter is (in mA)

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  7. Question 7

    This type asked 9 times: 10 May 2023 S1, 9 May 2024 S2, 10 May 2024 S1, 10 May 2024 S2, 13 May 2024 S2, 25 Apr 2025 S1, 17 Apr 2026 S2, 14 May 2026 S1, 15 May 2026 S2. This one: 15 May 2026 S2 See all 9 of this type

    138
    Same current is flowing in two AC circuits. First contains only inductance and second contains only capacitance. If frequency of AC is increased for both, the current will

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  8. Question 8

    This type asked 9 times: May 2022 S1, 10 May 2023 S2, 11 May 2023 S1, 15 May 2023 S1, 14 May 2024 S2, 19 Apr 2025 S2, 20 Apr 2025 S1, 21 Apr 2025 S2, 19 Apr 2026 S1. This one: 19 Apr 2026 S1 See all 9 of this type

    137
    For a series LCR circuit inductive reactance XLX_L is equal to resistance RR and also equal to twice the capacitive reactance XCX_C. The impedance of the circuit and the phase difference between voltage V and current i are respectively

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  9. Question 9

    This type asked 7 times: 4 May 2023 S2, 16 May 2023 S1, 16 May 2023 S2, 20 Apr 2025 S1, 11 Apr 2026 S2, 15 Apr 2026 S2, 14 May 2026 S1. This one: 14 May 2026 S1 See all 7 of this type

    137
    A coil of self inductance LL is connected in series with a bulb B and an a.c. source. Brightness of the bulb decreases when

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  10. Question 10

    This type asked 7 times: 3 May 2023 S1, 11 May 2023 S1, 10 May 2024 S2, 14 May 2024 S1, 25 Apr 2025 S2, 18 Apr 2026 S1, 20 Apr 2026 S2. This one: 20 Apr 2026 S2 See all 7 of this type

    137
    In an LCR series circuit an alternating voltage source of frequency FF is connected. The current leads the voltage by 45∘45^\circ. The value of LL is

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