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Day 173: JEE Mains Physics

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

  1. Question 1

    Units and Measurements. Asked once: 23 Jan 2026 S2 (same type asked 4 times) See all 4 of this type

    23
    A ball of radius r and density ρ\rho dropped through a viscous liquid of density σ\sigma and viscosity η\eta attains its terminal velocity at time t , given by t=Aρarbηcσdt = A\rho^{a}r^{b}\eta^{c}\sigma^{d}, where A is a constant and a,b,ca, b, c and dd are integers. The value of b+ca+d\frac{b + c}{a + d} is ____\_\_\_\_ .

  2. Question 2

    Current Electricity. Asked once: 3 Apr 2025 (same type asked 4 times) See all 4 of this type

    98
    Two cells of emf 1 V and 2 V and internal resistance 2Ω2\Omega and 1Ω1\Omega, respectively, are connected in series with an external resistance of 6Ω6\Omega. The total current in the circuit is I1I_{1}. Now the same two cells in parallel configuration are connected to same external resistance. In this case, the total current drawn is I2I_{2}. The value of (I1I2)\left( \frac{I_{1}}{I_{2}} \right) is x3\frac{x}{3}. The value of xx is .

  3. Question 3

    Work, Energy and Power. Asked once: 9 Apr 2024 (same type asked 4 times) See all 4 of this type

    14
    A particle of mass mm moves on a straight line with its velocity increasing with distance according to the equation v=αxv = \alpha\sqrt{x}, where α\alpha is a constant. The total work done by all the forces applied on the particle during its displacement from x=0x = 0 to x=dx = d, will be:

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  4. Question 4

    Oscillations. Asked once: 29 Jan 2024 (same type asked 4 times) See all 4 of this type

    115
    A simple harmonic oscillator has an amplitude A and time period 6π6\pi second. Assuming the oscillation starts from its mean position, the time required by it to travel from x=Ax=A to x=32Ax=\frac{\sqrt{3}}{2}A will be πx s\frac{\pi}{x}\text{ }s, where x=x = ____

  5. Question 5

    Units and Measurements. Asked once: 22 Jan 2025 (same type asked 4 times) See all 4 of this type

    78
    The maximum percentage error in the measurement of density of a wire is [Given, mass of wire =(0.60±0.003)g= (0.60 \pm 0.003)g, radius of wire =(0.50±0.01)cm= (0.50 \pm 0.01)cm, length of wire =(10.00±0.05)cm= (10.00 \pm 0.05)cm]

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