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Day 215: JEE Mains Physics

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

  1. Question 1

    Gravitation. Asked once: 2021 Paper 21 (same type asked 3 times) See all 3 of this type

    11
    A mass of 50 kg50\text{ }kg is placed at the centre of a uniform spherical shell of mass 100 kg100\text{ }kg and radius 50 m50\text{ }m. If the gravitational potential at a point, 25 m25\text{ }m from the centre is V kg/mV\ kg/m. The value of VV is:

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  2. Question 2

    Laws of Motion. Asked once: 28 Jul 2022 (same type asked 3 times) See all 3 of this type

    93
    A pressure-pump has a horizontal tube of cross-sectional area 10 cm210{\text{ }cm}^{2} for the outflow of water at a speed of 20 m/s20\text{ }m/s. The force exerted on the vertical wall just in front of the tube which stops water horizontally flowing out of the tube, is: [given: density of water =1000 kg/m3= 1000\text{ }kg/m^{3} ]

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  3. Question 3

    Thermal Properties of Matter. Asked once: 30 Jan 2023 (same type asked 3 times) See all 3 of this type

    115
    A faulty thermometer reads 5∘C5^{\circ}C in melting ice and 95∘C95^{\circ}C in steam. The correct temperature on absolute scale will be _____K\_\_\_\_\_K when the faulty thermometer reads 41∘C41^{\circ}C.

  4. Question 4

    Current Electricity. Asked once: 25 Jan 2023 (same type asked 3 times) See all 3 of this type

    9
    A uniform metallic wire carries a current 2 A2\text{ }A, when 3.4 V3.4\text{ }V battery is connected across it. The mass of uniform metallic wires is 8.92×10−3 kg8.92 \times10^{- 3}\text{ }kg density is 8.92×103 kg/m38.92 \times10^{3}\text{ }kg/m^{3} and resistivity is 1.7×10−8Ω−m1.7 \times10^{- 8}\Omega - m. The length of wire is:

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  5. Question 5

    Motion in a Plane. Asked once: 26 Jul 2022 (same type asked 3 times) See all 3 of this type

    21
    If the initial velocity in horizontal direction of a projectile is unit vector i^\widehat{i} and the equation of trajectory is y=5x(1−x)y = 5x(1 - x). The yy component of the initial velocity is ____\_\_\_\_ m/sm/s. (Take g=10 m/s2g = 10\text{ }m/s^{2} )