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Day 442: JEE Mains Physics

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

  1. Question 1

    Work, Energy and Power. Asked once: 2 Apr 2026 S2

    11
    A spherical ball of mass 2 kg falls from a height of 10 m and is brought to rest after penetrating 10 cm into sand. The average force exerted by sand on the ball is ____\_\_\_\_ N.

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  2. Question 2

    Alternating Current. Asked once: 21 Jan 2026 S2

    4
    A capacitor C is first charged fully with potential difference of V0V_{0} and disconnected from the battery. The charged capacitor is connected across an inductor having inductance L . In t s 25%25\% of the initial energy in the capacitor is transferred to the inductor. The value of t is ____\_\_\_\_ s.

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  3. Question 3

    Atoms. Asked once: 24 Jan 2026 S1

    7
    Two electrons are moving in orbits of two hydrogen like atoms with speeds 3×105 m/s3 \times10^{5}\text{ }m/s and 2.5×105 m/s2.5 \times10^{5}\text{ }m/s respectively. If the radii of these orbits are nearly same then the possible order of energy states are ____\_\_\_\_ respectively.

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  4. Question 4

    Current Electricity. Asked once: 5 Apr 2026 S2

    12
    Under steady state condition the potential difference across the capacitor in the circuit is ____\_\_\_\_ V.

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  5. Question 5

    Dual Nature of Radiation and Matter. Asked once: 21 Jan 2026 S2

    23
    A particle having electric charge 3×10−19C3 \times 10^{- 19}C and mass 6×10−27 kg6 \times 10^{- 27}\text{ }kg is accelerated by applying an electric potential of 1.21 V. Wavelength of the matter wave associated with the particle is α×10−12 m\alpha \times 10^{- 12}\text{ }m. The value of α\alpha is ____\_\_\_\_ . (Take Planck's constant =6.6×10−34 J.s= 6.6 \times 10^{- 34}\text{ }J.s )