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Day 31: JEE Mains Physics

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

  1. Question 1

    Semiconductor Electronics. This type asked 5 times: 14 Jun 2022, 25 Jun 2022, 29 Jun 2022, 26 Jul 2022, 13 Apr 2023. This one: 13 Apr 2023 See all 5 of this type

    30
    From the given transfer characteristic of a transistor in CE configuration, the value of power gain of this configuration is 10x10^{x}, for RB=10kΩR_{B}= 10k\Omega, and RC=1kΩR_{C}= 1k\Omega. The value of xx is_____

  2. Question 2

    Waves. This type asked 5 times: 2021 Paper 20, 27 Jun 2022, 25 Jan 2023, 29 Jan 2023, 11 Apr 2023. This one: 11 Apr 2023 See all 5 of this type

    92
    A car PP travelling at 20 ms−120{\text{ }ms}^{- 1} sounds its horn at a frequency of 400 Hz400\text{ }Hz. Another car Q is travelling behind the first car in the same direction with a velocity 40 ms−140{\text{ }ms}^{- 1}. The frequency heard by the passenger of the car QQ is approximately [Take, velocity of sound =360 ms−1= 360{\text{ }ms}^{- 1} ]

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  3. Question 3

    Alternating Current. This type asked 5 times: 2021 Paper 9, 2021 Paper 25, 28 Jul 2022, 24 Jan 2023, 8 Apr 2023. This one: 8 Apr 2023 See all 5 of this type

    111
    A series combination of resistor of resistance 100 Ω\Omega, inductor of inductance 1H1H and capacitor of capacitance 6.25μF6.25\mu F is connected to an ac source. The quality factor of the circuit will be___

  4. Question 4

    Nuclei. This type asked 5 times: 2021 Paper 12, 2021 Paper 15, 27 Jul 2022, 28 Jul 2022, 8 Apr 2023. This one: 8 Apr 2023 See all 5 of this type

    96
    A radio-active material is reduced to 1/81/8 of its original amount in 3 days. If 8×10−3 kg8 \times10^{- 3}\text{ }kg of the material is left after 5 days. The initial amount of the material is

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  5. Question 5

    Kinetic Theory. This type asked 5 times: 28 Jun 2022, 28 Jul 2022, 24 Jan 2023, 25 Jan 2023, 6 Apr 2023. This one: 6 Apr 2023 See all 5 of this type

    105
    The temperature of an ideal gas is increased from 200 K200\text{ }K to 800 K800\text{ }K. If r.m.s. speed of gas at 200 K200\text{ }K is v0v_{0}. Then, r.m.s. speed of the gas at 800 K800\text{ }K will be:

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