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Day 334: JEE Mains Physics

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

  1. Question 1

    Electromagnetic Induction. Asked once: 1 Feb 2023 (same type asked 7 times) See all 7 of this type

    112
    A square shaped coil of area 70 cm270{\text{ }cm}^{2} having 600 turns rotates in a magnetic field of 0.4wbm−20.4wbm^{- 2}, about an axis which is parallel to one of the side of the coil and perpendicular to the direction of field. If the coil completes 500 revolution in a minute, the instantaneous emf when the plane of the coil is inclined at 60∘60^{\circ} with the field, will be ____\_\_\_\_ V. (Take π=227\pi=\frac{22}{7} )

  2. Question 2

    System of Particles and Rotational Motion. Asked once: 27 Jan 2024 (same type asked 7 times) See all 7 of this type

    116
    A ring and a solid sphere roll down the same inclined plane without slipping. They start from rest. The radii of both bodies are identical and the ratio of their kinetic energies is 7x\frac{7}{x} where xx is ______

  3. Question 3

    Motion in a Straight Line. Asked once: 28 Jun 2022 (same type asked 7 times) See all 7 of this type

    120
    A car covers ABAB distance with first one-third at velocity v1 ms−1v_{1}{\text{ }ms}^{- 1}, second one-third at v2 ms−1v_{2}{\text{ }ms}^{- 1} and last one-third at v3 ms−1v_{3}{\text{ }ms}^{- 1}. If v3=3v1,v2=2v1v_{3}= 3v_{1},v_{2}= 2v_{1} and v1=11 ms−1v_{1}= 11{\text{ }ms}^{- 1} then the average velocity of the car is ____\_\_\_\_ ms−1ms^{- 1}.

  4. Question 4

    Thermal Properties of Matter. Asked once: 25 Jan 2023 (same type asked 7 times) See all 7 of this type

    12
    A bowl filled with very hot soup cools from 98∘C98^{\circ}C to 86∘C86^{\circ}C in 2 minutes when the room temperature is 22∘C22^{\circ}C. How long it will take to cool from 75∘C75^{\circ}C to 69∘C69^{\circ}C ?

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  5. Question 5

    Current Electricity. Asked once: 30 Jan 2024 (same type asked 7 times) See all 7 of this type

    13
    An electric toaster has resistance of 60Ω60\Omega at room temperature (27∘C)\left( 27^{\circ}C \right). The toaster is connected to a 220 V220\text{ }V supply. If the current flowing through it reaches 2.75 A2.75\text{ }A, the temperature attained by toaster is around: (if α=2×10−4/ ∘C\alpha= 2 \times10^{- 4}/\ ^{\circ}C )

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