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Day 295: JEE Mains Physics

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

  1. Question 1

    Moving Charges and Magnetism. Asked once: 27 Jan 2024 (same type asked 4 times) See all 4 of this type

    4
    A proton moving with a constant velocity passes through a region of space without any change in its velocity. If E→\overrightarrow{E} and B→\overrightarrow{B} represent the electric and magnetic fields respectively, then the region of space may have: (A) E=0, B=0E = 0,\text{ }B = 0 (B) E=0, B≠0E = 0,\text{ }B \neq 0 (C) E≠0, B=0E \neq 0,\text{ }B = 0 (D) E≠0, B≠0E \neq 0,\text{ }B \neq 0 Choose the most appropriate answer from the options given below:

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  2. Question 2

    Laws of Motion. Asked once: 26 Jul 2022 (same type asked 4 times) See all 4 of this type

    108
    Two masses M1M_{1} and M2M_{2} are tied together at the two ends of a light inextensible string that passes over a frictionless pulley. When the mass M2M_{2} is twice that of M1M_{1}. the acceleration of the system is a1a_{1}. When the mass M2M_{2} is thrice that of M1M_{1}. the acceleration of the system is a2a_{2}. The ratio a1a2\frac{a_{1}}{a_{2}} will be:

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  3. Question 3

    Mechanical Properties of Solids. Asked once: 24 Jan 2023 (same type asked 4 times) See all 4 of this type

    7
    A 100 m100\text{ }m long wire having cross-sectional area 6.25×10−4 m26.25 \times10^{- 4}{\text{ }m}^{2} and Young's modulus is 1010Nm−210^{10}Nm^{- 2} is subjected to a load of 250 N250\text{ }N, then the elongation in the wire will be:

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  4. Question 4

    Motion in a Straight Line. Asked once: 1 Feb 2023 (same type asked 4 times) See all 4 of this type

    115
    For a train engine moving with speed of 20 ms−120{\text{ }ms}^{- 1}, the driver must apply brakes at a distance of 500 m500\text{ }m before the station for the train to come to rest at the station. If the brakes were applied at half of this distance, the train engine would cross the station with speed x ms−1\sqrt{x}{\text{ }ms}^{- 1}. The value of xx is___ (Assuming same retardation is produced by brakes)

  5. Question 5

    Oscillations. Asked once: 30 Jan 2023 (same type asked 4 times) See all 4 of this type

    110
    For a simple harmonic motion in a mass spring system shown, the surface is frictionless. When the mass of the block is 1 kg1\text{ }kg, the angular frequency is ω1\omega_{1}. When the mass block is 2 kg2\text{ }kg the angular frequency is ω2\omega_{2}. The ratio ω2/ω1\omega_{2}/\omega_{1} is

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