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Day 243: JEE Mains Physics

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

  1. Question 1

    Work, Energy and Power. Asked once: 29 Jul 2022 (same type asked 2 times) See all 2 of this type

    105
    If momentum of a body is increased by 20%20\%, then its kinetic energy increases by :

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  2. Question 2

    Electromagnetic Induction. Asked once: 1 Feb 2023 (same type asked 2 times) See all 2 of this type

    105
    A coil is placed in magnetic field such that plane of coil is perpendicular to the direction of magnetic field. The magnetic flux through a coil can be changed: (A) By changing the magnitude of the magnetic field within the coil. (B) By changing the area of coil within the magnetic field. (C) By changing the angle between the direction of magnetic field and the plane of the coil. (D) By reversing the magnetic field direction abruptly without changing its magnitude. Choose the most appropriate answer from the options given below:

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  3. Question 3

    Semiconductor Electronics. Asked once: 31 Jan 2023 (same type asked 2 times) See all 2 of this type

    5
    The effect of increase in temperature on the number of electrons in conduction band (ne)\left( n_{e} \right) and resistance of a semiconductor will be as:

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  4. Question 4

    Thermodynamics. Asked once: 2021 Paper 18 (same type asked 2 times) See all 2 of this type

    6
    An electric appliance supplies 6000 J/min6000\text{ }J/min heat to the system. If the system delivers a power of 90 W90\text{ }W, how long would it take to increase the internal energy by 2.5×103 J2.5\times10^{3}\text{ }J?

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  5. Question 5

    Units and Measurements. Asked once: 2021 Paper 24 (same type asked 2 times) See all 2 of this type

    9
    Two resistors R1=(4±0.8)ΩR_{1}= (4 \pm 0.8)\Omega and R2=(4±0.4)ΩR_{2}=\left( 4 \pm 0.4 \right)\Omega are connected in parallel. The equivalent resistance of their parallel combination will be:

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