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Day 132: JEE Mains Physics

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

  1. Question 1

    Waves. This type asked 2 times: 29 Jul 2022, 11 Apr 2023. This one: 11 Apr 2023 See all 2 of this type

    118
    A wire of density 8×103 kg/m38 \times10^{3}\text{ }kg/m^{3} is stretched between two clamps 0.5 m0.5\text{ }m apart. The extension developed in the wire is 3.2×10−4 m3.2 \times10^{- 4}\text{ }m. If Y=8×1010Y = 8 \times10^{10} N/m2N/m^{2}, the fundamental frequency of vibration in the wire will be___ HzHz.

  2. Question 2

    Current Electricity. This type asked 2 times: 2021 Paper 7, 8 Apr 2023. This one: 8 Apr 2023 See all 2 of this type

    29
    A current of 2 A flows through a wire of crosssectional area 25.0 mm225.0{\text{ }mm}^{2}. The number of free electrons in a cubic meter are 2.0×10282.0 \times10^{28}. The drift velocity of the electrons is ____\_\_\_\_ ×10−6 ms−1\times10^{- 6}{\text{ }ms}^{- 1} (given, charge on electron =1.6×10−19C= 1.6 \times10^{- 19}C )

  3. Question 3

    Gravitation. This type asked 2 times: 26 Jul 2022, 8 Apr 2023. This one: 8 Apr 2023 See all 2 of this type

    101
    The acceleration due to gravity at height hh above the earth if h<<Rh < < R (radius of earth) is given by

    Tap an option to check your answer.

  4. Question 4

    Ray Optics. This type asked 2 times: 2021 Paper 22, 8 Apr 2023. This one: 8 Apr 2023 See all 2 of this type

    22
    Two vertical parallel mirrors AA and BB are separated by 10 cm10\text{ }cm. A point object OO is placed at a distance of 2 cm2\text{ }cm from mirror AA. The distance of the second nearest image behind mirror A from the mirror A is ____\_\_\_\_ cm.

  5. Question 5

    Work, Energy and Power. This type asked 2 times: 29 Jul 2022, 8 Apr 2023. This one: 8 Apr 2023 See all 2 of this type

    23
    The momentum of a body is increased by 50%50\%. The percentage increase in the kinetic energy of the body is____ %\%