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Day 351: JEE Mains Physics

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

  1. Question 1

    Alternating Current. Asked once: 29 Jan 2023 (same type asked 5 times) See all 5 of this type

    102
    For the given figures, choose the correct options. Figure (a): a 40 Ω40\ \Omega resistor across a 220 V,50 Hz220\ V, 50\ Hz source. Figure (b): the same 40 Ω40\ \Omega resistor in series with a 50 mH50\ mH inductor and a 0.5 μF0.5\ \mu F capacitor across the same source.

    Tap an option to check your answer.

  2. Question 2

    Laws of Motion. Asked once: 26 Jun 2022 (same type asked 5 times) See all 5 of this type

    2
    A person is standing in an elevator. In which situation, he experiences weight loss?

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  3. Question 3

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

    112
    A batsman hits back a ball of mass 0.4 kg0.4\text{ }kg straight in the direction of the bowler without changing its initial speed of 15 ms−115{\text{ }ms}^{- 1}. The impulse imparted to the ball is ____\_\_\_\_ Ns.

  4. Question 4

    Semiconductor Electronics. Asked once: 25 Jun 2022 (same type asked 5 times) See all 5 of this type

    120
    In an experiment of CECE configuration of n−p−nn-p-n transistor, the transfer characteristics are observed as given in figure. If the input resistance is 200Ω200\Omega and output resistance is 60Ω60\Omega the voltage gain in this experiment will be

  5. Question 5

    Waves. Asked once: 27 Jun 2022 (same type asked 5 times) See all 5 of this type

    16
    An observer moves towards a stationary source of sound with a velocity equal to one-fifth of the velocity of sound. The percentage change in the frequency will be:

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