PYQ Vault

How reactance (and current) change when frequency, inductance or capacitance change

This type of question, 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. All 9 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    10 May 2023 S1

    47
    The inductive reactance of a coil is 'RR Ω\,\Omega'. If inductance of a coil is tripled and frequency of a.c. supply is also tripled, then new inductive reactance will be

    Tap an option to check your answer.

  2. Question 2

    9 May 2024 S2

    47
    The reactance of capacitor at 50 Hz is 5 Ω5\,\Omega. If the frequency is increased to 100 Hz, the new reactance is

    Tap an option to check your answer.

  3. Question 3

    10 May 2024 S1

    12
    The inductive reactance of a coil is 'XLX_L'. If inductance is tripled and frequency is doubled, the new inductive reactance will be

    Tap an option to check your answer.

  4. Question 4

    10 May 2024 S2

    47
    The capacitive reactance of a capacitor 'CC' is 'X ΩX\,\Omega'. Both, the frequency of a.c. supply and capacitance of the above capacitor are doubled. The new capacitive reactance will be

    Tap an option to check your answer.

  5. Question 5

    13 May 2024 S2

    34
    At a particular angular frequency, the reactance of capacitor and that of inductor is same. If the angular frequency is doubled, the ratio of the reactance of the capacitor to that of the inductor will be

    Tap an option to check your answer.

  6. Question 6

    25 Apr 2025 S1

    4
    The reactance of a capacitor is XCX_{C}. If the frequency and the capacitance are doubled, then the new reactance will be

    Tap an option to check your answer.

  7. Question 7

    17 Apr 2026 S2

    137
    In LCR circuit, at a particular angular frequency the capacitive reactance and inductive reactance is same. If the angular frequency is doubled, the ratio of the reactance of the capacitor to that of the inductor will be

    Tap an option to check your answer.

  8. Question 8

    14 May 2026 S1

    138
    In an a.c. circuit, if the frequency is doubled, what happens to the capacitive reactance (Xc)(X_c) and the current (I)(I)?

    Tap an option to check your answer.

  9. Question 9

    15 May 2026 S2

    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

    Tap an option to check your answer.