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Day 393: JEE Mains Physics

5 questions. Try each one first, then open its answer.

  1. Question 1

    Work, Energy and Power. Asked once: 26 Jul 2022 (same type asked 5 times) See all 5 of this type

    94
    A body of mass 8 kg8\text{ }kg and another of mass 2 kg2\text{ }kg are moving with equal kinetic energy. The ratio of their respective momenta will be:

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  2. Question 2

    Alternating Current. Asked once: 29 Jun 2022 (same type asked 5 times) See all 5 of this type

    10
    For a series LCR circuit, I vs ω\omega curve is shown: (A) To the left of ωr\omega_{r}, the circuit is mainly capacitive. (B) To the left of ωr\omega_{r}, the circuit is mainly inductive. (C) At ωr\omega_{r}, impedance of the circuit is equal to the resistance of the circuit. (D) At ωr\omega_{r}, impedance of the circuit is 0. Choose the most appropriate answer from the options given below:

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  3. Question 3

    Laws of Motion. Asked once: 2021 Paper 25 (same type asked 5 times) See all 5 of this type

    30
    A person standing on a spring balance inside a stationary lift measures 60 kg60\text{ }kg. The weight of that person if the lift descends with uniform downward acceleration of 1.8 m/s21.8\text{ }m/s^{2} will be ___ N. [g=10 m/s2]\left\lbrack g= 10\text{ }m/s^{2} \right\rbrack

  4. Question 4

    Work, Energy and Power. Asked once: 2021 Paper 14 (same type asked 5 times) See all 5 of this type

    4
    Find the ratio of the impulse transferred to the wall by a ball incident normally and then at 45∘45^{\circ} with normal?

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  5. Question 5

    Semiconductor Electronics. Asked once: 14 Jun 2022 (same type asked 5 times) See all 5 of this type

    23
    A transistor is used in common-emitter mode in an amplifier circuit. When a signal of 10mV10mV is added to the base-emitter voltage, the base current changes by 10μA10\mu A and the collector current changes by 1.5 mA1.5\text{ }mA. The load resistance is 5kΩ5k\Omega. The voltage gain of the transistor will be