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Day 127: JEE Mains Physics

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

  1. Question 1

    Motion in a Plane. This type asked 2 times: 28 Jun 2022, 4 Apr 2024. This one: 4 Apr 2024 See all 2 of this type

    19
    The co-ordinates of a particle moving in x−yx - y plane are given by: x=2+4t,y=3t+8t2x = 2 + 4t,y = 3t + 8t^{2}. The motion of the particle is:

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  2. Question 2

    Oscillations. This type asked 2 times: 27 Jun 2022, 4 Apr 2024. This one: 4 Apr 2024 See all 2 of this type

    111
    The displacement of a particle executing SHM is given by x=10sin⁡(ωt+π3)mx = 10\sin\left( \omega t +\frac{\pi}{3} \right)m. The time period of motion is 3.14 s3.14\text{ }s. The velocity of the particle at t=0t = 0 is ______ m/sm/s.

  3. Question 3

    Alternating Current. This type asked 2 times: 30 Jan 2024, 1 Feb 2024. This one: 1 Feb 2024 See all 2 of this type

    108
    A transformer has an efficiency of 80%80\% and works at 10 V10\text{ }V and 4 kW4\text{ }kW. If the secondary voltage is 240 V240\text{ }V, then the current in the secondary coil is :

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  4. Question 4

    Electromagnetic Induction. This type asked 2 times: 2021 Paper 6, 1 Feb 2024. This one: 1 Feb 2024 See all 2 of this type

    22
    A rectangular loop of sides 12 cm12\text{ }cm and 5 cm5\text{ }cm, with its sides parallel to the xx-axis and yy-axis respectively moves with a velocity of 5 cm/s5\text{ }cm/s in the positive xx axis direction, in a space containing a variable magnetic field in the positive zz direction. The field has a gradient of 10−3 T/cm10^{- 3}\text{ }T/cm along the negative xx direction and it is decreasing with time at the rate of 10−3 T/s10^{- 3}\text{ }T/s. If the resistance of the loop is 6 mΩ6\text{ }m\Omega, the power dissipated by the loop as heat is ______ ×10−9 W\times10^{- 9}\text{ }W.

  5. Question 5

    Electromagnetic Waves. This type asked 2 times: 26 Jul 2022, 1 Feb 2024. This one: 1 Feb 2024 See all 2 of this type

    98
    If frequency of electromagnetic wave is 60MHz60MHz and it travels in air along zz direction then the corresponding electric and magnetic field vectors will be mutually perpendicular to each other and the wavelength of the wave (in mm ) is :

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