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Day 81: JEE Mains Physics

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

  1. Question 1

    Electromagnetic Induction. This type asked 3 times: 2021 Paper 18, 25 Jun 2022, 11 Apr 2023. This one: 11 Apr 2023 See all 3 of this type

    116
    A coil has an inductance of 2H2H and resistance of 4Ω4\Omega. A 10 V10\text{ }V is applied across the coil. The energy stored in the magnetic field after the current has built up to its equilibrium value will be __×10−2 J\times10^{- 2}\text{ }J

  2. Question 2

    Gravitation. This type asked 3 times: 2021 Paper 18, 2021 Paper 21, 11 Apr 2023. This one: 11 Apr 2023 See all 3 of this type

    97
    If VV is the gravitational potential due to sphere of uniform density on it's surface, then it's value at the center of sphere will be: -

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  3. Question 3

    Laws of Motion. This type asked 3 times: 29 Jun 2022, 28 Jul 2022, 11 Apr 2023. This one: 11 Apr 2023 See all 3 of this type

    19
    An average force of 125 N125\text{ }N is applied on a machine gun firing bullets each of mass 10 g10\text{ }g at the speed of 250 m/s250\text{ }m/s to keep it in position. The number of bullets fired per second by the machine gun is:

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  4. Question 4

    Thermal Properties of Matter. This type asked 3 times: 25 Jan 2023, 30 Jan 2023, 11 Apr 2023. This one: 11 Apr 2023 See all 3 of this type

    16
    On a temperature scale ' XX '. The boiling point of water is 65∘X65^{\circ}X and the freezing point is −15∘X-15^{\circ}X. Assume that the XX scale is linear. The equivalent temperature corresponding to −95∘X-95^{\circ}X on the Fahrenheit scale would be:

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  5. Question 5

    Current Electricity. This type asked 3 times: 24 Jan 2023, 25 Jan 2023, 10 Apr 2023. This one: 10 Apr 2023 See all 3 of this type

    117
    A rectangular parallelopiped is measured as 1 cm×1 cm×100 cm1\text{ }cm \times 1\text{ }cm \times 100\text{ }cm. If its specific resistance is 3×10−7Ωm3 \times10^{- 7}\Omega m, then the resistance between its two opposite rectangular faces will be___ ×10−7Ω\times 10^{- 7}\Omega.