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Day 239: JEE Mains Physics

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

  1. Question 1

    Thermodynamics. Asked once: 2021 Paper 26 (same type asked 2 times) See all 2 of this type

    29
    The volume VV of a given mass of monatomic gas changes with temperature TT according to the relation V=KT23V=KT^{\frac{2}{3}}. The work done when temperature changes by 90 K90\text{ }K will be xRxR. The value of xx is

  2. Question 2

    Units and Measurements. Asked once: 31 Jan 2024 (same type asked 2 times) See all 2 of this type

    9
    If the percentage errors in measuring the length and the diameter of a wire are 0.1%0.1\% each. The percentage error in measuring its resistance will be:

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  3. Question 3

    Alternating Current. Asked once: 29 Jan 2024 (same type asked 2 times) See all 2 of this type

    94
    In an a.c. circuit, voltage and current are given by: V=100sin⁡(100t)VV = 100\sin(100t)V and I=100sin⁡(100t+π3)mAI = 100\sin\left( 100t +\frac{\pi}{3} \right)mA respectively. The average power dissipated in one cycle is:

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  4. Question 4

    Current Electricity. Asked once: 27 Jul 2022 (same type asked 2 times) See all 2 of this type

    112
    In the given figure of meter bridge experiment, the balancing length ACAC corresponding to null deflection of the galvanometer is 40 cm40\text{ }cm. The balancing length, if the radius of the wire ABAB is doubled, will be ____\_\_\_\_ cm.

  5. Question 5

    Electrostatics. Asked once: 24 Jan 2023 (same type asked 2 times) See all 2 of this type

    8
    If two charges q1q_{1} and q2q_{2} are separated with distance ' dd ' and placed in a medium of dielectric constant KK. What will be the equivalent distance between charges in air for the same electrostatic force?

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