PYQ Vault
EbooksTutor

Day 265: JEE Mains Physics

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

  1. Question 1

    Nuclei. Asked once: 1 Feb 2024 (same type asked 6 times) See all 6 of this type

    25
    The radius of a nucleus of mass number 64 is 4.8 fermi. Then the mass number of another nucleus having radius of 4 fermi is 1000x\frac{1000}{x}, where xx is ______ .

  2. Question 2

    Moving Charges and Magnetism. Asked once: 24 Jan 2023 (same type asked 6 times) See all 6 of this type

    3
    Two long straight wires PP and QQ carrying equal current 10 A10\text{ }A each were kept parallel to each other at 5 cm5\text{ }cm distance. Magnitude of magnetic force experienced by 10 cm10\text{ }cm length of wire PP is F1F_{1} - If distance between wires is halved and currents on them are doubled, force F2F_{2} on 10 cm10\text{ }cm length of wire PP will be:

    Tap an option to check your answer.

  3. Question 3

    System of Particles and Rotational Motion. Asked once: 15 Apr 2023 (same type asked 6 times) See all 6 of this type

    25
    A solid sphere and a solid cylinder of same mass and radius are rolling on a horizontal surface without slipping. The ratio of their radius of gyrations respectively (ksph:kcyl)\left( k_{sph}:k_{cyl} \right) is 2:x2:\sqrt{x}, then value of xx is___

  4. Question 4

    Current Electricity. Asked once: 1 Feb 2024 (same type asked 6 times) See all 6 of this type

    106
    In a metre-bridge when a resistance in the left gap is 2Ω2\Omega and unknown resistance in the right gap, the balance length is found to be 40 cm40\text{ }cm. On shunting the unknown resistance with 2Ω2\Omega, the balance length changes by:

    Tap an option to check your answer.

  5. Question 5

    Moving Charges and Magnetism. Asked once: 9 Apr 2024 (same type asked 6 times) See all 6 of this type

    15
    A galvanometer has a coil of resistance 200Ω200\Omega with a full- scale deflection at 20μA20\mu A. The value of resistance to be added to use it as an ammeter of range (0−20)mA(0 - 20)mA is:

    Tap an option to check your answer.