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Day 29: JEE Mains Physics

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

  1. Question 1

    Alternating Current. This type asked 5 times: 2021 Paper 26, 26 Jun 2022, 31 Jan 2023, 8 Apr 2024, 22 Jan 2025. This one: 22 Jan 2025 See all 5 of this type

    79
    A series LCR circuit is connected to an alternating source of emf EE. The current amplitude at resonant frequency is I0I_{0}. If the value of resistance RR becomes twice of its initial value then amplitude of current at resonance will be

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  2. Question 2

    Electrostatics. This type asked 5 times: 2021 Paper 24, 30 Jan 2023, 31 Jan 2023, 1 Feb 2023, 9 Apr 2024. This one: 9 Apr 2024 See all 5 of this type

    114
    An electric field E→=(2xi^)NC−1\overrightarrow{E}= (2x\widehat{i})NC^{- 1} exists in space. AA cube of side 2 m2\text{ }m is placed in the space as per figure given below. The electric flux through the cube is________ Nm2/CNm^{2}/C.

  3. Question 3

    Motion in a Plane. This type asked 5 times: 2021 Paper 15, 25 Jun 2022, 29 Jun 2022, 31 Jan 2024, 9 Apr 2024. This one: 9 Apr 2024 See all 5 of this type

    21
    If a→\overrightarrow{a} and b→\overrightarrow{b} makes an angle cos⁡−1(59)\cos^{- 1}\left( \frac{5}{9} \right) with each other, then ∣a→+b→∣=2∣a→−b→∣|\overrightarrow{a}+\overrightarrow{b}| =\sqrt{2}|\overrightarrow{a}-\overrightarrow{b}| for ∣a→∣=n∣b→∣|\overrightarrow{a}| = n|\overrightarrow{b}| The integer value of nn is______.

  4. Question 4

    Semiconductor Electronics. This type asked 5 times: 2021 Paper 25, 25 Jul 2022, 1 Feb 2024, 6 Apr 2024, 9 Apr 2024. This one: 9 Apr 2024 See all 5 of this type

    5
    A light emitting diode (LED) is fabricated using GaAs semiconducting material whose band gap is 1.42eV1.42eV. The wavelength of light emitted from the LED is:

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  5. Question 5

    Work, Energy and Power. This type asked 5 times: 26 Jul 2022, 13 Apr 2023, 27 Jan 2024, 6 Apr 2024, 8 Apr 2024. This one: 8 Apr 2024 See all 5 of this type

    1
    Three bodies A, B and CC have equal kinetic energies and their masses are 400 g,1.2 kg400\text{ }g,1.2\text{ }kg and 1.6 kg1.6\text{ }kg respectively. The ratio of their linear momenta is:

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