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Day 207: JEE Mains Physics

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

  1. Question 1

    Motion in a Plane. Asked once: 24 Jan 2023 (same type asked 3 times) See all 3 of this type

    99
    If two vectors P→=ı^+2mȷ^+mk^\overrightarrow{P}=\widehat{\imath}+ 2m\widehat{\jmath}+ m\widehat{k} and Q→=4ı^−2ȷ^+mk^\overrightarrow{Q}= 4\widehat{\imath}- 2\widehat{\jmath}+ m\widehat{k} are perpendicular to each other. Then, the value of mm will be:

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  2. Question 2

    Dual Nature of Radiation and Matter. Asked once: 31 Jan 2023 (same type asked 3 times) See all 3 of this type

    92
    If the two metals AA and BB are exposed to radiation of wavelength 350 nm350\text{ }nm. The work functions of metals A and B are 4.8eV and 2.2eV. Then choose the correct option.

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  3. Question 3

    Electromagnetic Induction. Asked once: 9 Apr 2024 (same type asked 3 times) See all 3 of this type

    96
    A square loop of side 15 cm15\text{ }cm being moved towards right at a constant speed of 2 cm/s2\text{ }cm/s as shown in figure. The front edge enters the 50 cm50\text{ }cm wide magnetic field at t=0t = 0. The value of induced emf in the loop at t=10 st = 10\text{ }s will be:

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  4. Question 4

    Motion in a Plane. Asked once: 4 Apr 2024 (same type asked 3 times) See all 3 of this type

    29
    Two forces F→1{\overrightarrow{F}}_{1} and F→2{\overrightarrow{F}}_{2} are acting on a body. One force has magnitude thrice that of the other force and the resultant of the two forces is equal to the force of larger magnitude. The angle between F→1{\overrightarrow{F}}_{1} and F→2{\overrightarrow{F}}_{2} is cos⁡−1(1n)\cos^{- 1}\left( \frac{1}{n} \right). The value of ∣n∣|n| is___

  5. Question 5

    Gravitation. Asked once: 10 Apr 2023 (same type asked 3 times) See all 3 of this type

    13
    Two satellites of masses mm and 3 m3\text{ }m revolve around the earth in circular orbits of radii rr & 3r3r respectively. The ratio of orbital speeds of the satellites respectively is:

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