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Day 353: JEE Mains Physics

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

  1. Question 1

    Waves. Asked once: 14 Jun 2022 (same type asked 5 times) See all 5 of this type

    12
    The equations of two waves are given by:
    y1=5sin⁡2π(x−vt)cmy2=3sin⁡2π(x−vt+1.5)cm\begin{matrix} & y_{1}= 5\sin2\pi(x - vt)cm \\ & y_{2}= 3\sin2\pi(x - vt + 1.5)cm \end{matrix}
    These waves are simultaneously passing through a string. The amplitude of the resulting wave is

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  2. Question 2

    Units and Measurements. Asked once: 24 Jan 2023 (same type asked 4 times) See all 4 of this type

    92
    The frequency (v)(v) of an oscillating liquid drop may depend upon radius (r)(r) of the drop, density (ρ)(\rho) of liquid and the surface tension (s) of the liquid as: v=raρbscv =r^{a}\rho^{b}s^{c}. The values of a,ba,b and cc respectively are

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  3. Question 3

    Current Electricity. Asked once: 25 Jan 2023 (same type asked 4 times) See all 4 of this type

    120
    Two cells are connected between points AA and BB as shown. Cell 1 has emf of 12 V12\text{ }V and internal resistance of 3Ω3\Omega. Cell 2 has emf of 6 V6\text{ }V and internal resistance of 6Ω6\Omega. An external resistor R of 4Ω4\Omega is connected across A and B. The current flowing through RR will be ____A.

  4. Question 4

    Work, Energy and Power. Asked once: 29 Jun 2022 (same type asked 4 times) See all 4 of this type

    8
    A particle of mass 500gm500gm is moving in a straight line with velocity v=bx5/2v=bx^{5/2}. The work done by the net force during its displacement from x=0x = 0 to x=4 mx = 4\text{ }m is: (Take  b=0.25 m−3/2 s−1)\left. \ b = 0.25{\text{ }m}^{- 3/2}{\text{ }s}^{- 1} \right).

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  5. Question 5

    Oscillations. Asked once: 27 Jun 2022 (same type asked 4 times) See all 4 of this type

    114
    A particle executes simple harmonic motion. Its amplitude is 8 cm8\text{ }cm and time period is 6 s6\text{ }s. The time it will take to travel from its position of maximum displacement to the point corresponding to half of its amplitude, is ____\_\_\_\_ s.