13 April 2023 Evening Shift physics questions with solutions

Showing 1–10 of 29 questions

• IntegermediumElectromagnetic InductionMagnetic Flux,Faraday's Laws of Electromagnetic Induction and Lenz's Law

  An insulated copper wire of 100 turns is wound on a wooden core of cross-sectional area 24 cm² and connected to a total circuit resistance of 12 Ω. The axial magnetic field changes from 1.5 T in one direction to 1.5 T in the opposite direction. Find the charge that flows, in mC.

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• MCQeasyWave OpticsYoung's Double-Slit Experiment (YDSE)

  In a Young's double-slit experiment, the amplitudes of light coming from the two slits are in the ratio 2:1. The ratio of maximum to minimum intensity is:

  Options

  • Option A

    9 : 1

  • Option B

    9 : 4

  • Option C

    2 : 1

  • Option D

    25 : 9

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• A/RmediumProperties of solid and fluidViscosity, Stokes' Law and Terminal Velocity

  Given below are two statements: one is labelled Assertion A and the other is labelled Reason R.

  Assertion

  A spherical body of radius (5 ± 0.1) mm falls through a liquid of constant density. The percentage error in calculation of its terminal velocity is 4%.

  Reason

  The terminal velocity of the spherical body in the liquid is inversely proportional to its radius.

  Options

  • Option A

    Both A and R are true but R is NOT the correct explanation of A

  • Option B

    Both A and R are true and R is the correct explanation of A

  • Option C

    A is false but R is true

  • Option D

    A is true but R is false

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• MCQmediumCapacitorRC Circuits: Charging & Discharging

  In the shown network, the charge accumulated on the 4 μF capacitor in steady state is:

  

  Options

  • Option A

    4.8 μC

  • Option B

    12 μC

  • Option C

    7.2 μC

  • Option D

    10.3 μC

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• MCQeasySimple Harmonic MotionKinetic Energy, Potential Energy and Conservation of Energy in SHM

  A particle executes SHM with amplitude A. The distance from the mean position when its kinetic energy equals its potential energy is:

  Options

  • Option A

    √2A

  • Option B

    A/2

  • Option C

    A/√2

  • Option D

    2A

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• IntegermediumWave MotionStanding Waves on Strings, Harmonics and Sonometer

  In a sonometer experiment, a 180 g mass gives fundamental frequency 30 Hz. If another mass m gives frequency 50 Hz, find m in grams.

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• MCQmediumMagnetic effect of currentMotion of Charged Particles in a Magnetic Field

  An electron moves along +x in a uniform magnetic field along -z.
  A. Magnetic force is along +y.
  B. Magnetic force is along -y.
  C. It experiences no magnetic force.
  D. It continues along +x. E. It moves along a circular path. Choose the correct answer.

  Options

  • Option A

    B and E only

  • Option B

    A and E only

  • Option C

    B and D only

  • Option D

    C and D only

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• IntegereasyWork , Power and EnergyKinetic Energy & Work-Energy Theorem

  A car accelerates from rest to speed u using energy E. Find n if the energy required to accelerate it from u to 2u is nE.

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• MCQmediumThermodynamicsThermodynamic Processes, P-V Diagrams and Work Done

  An ideal gas initially has pressure P₀ and volume V₀. It is suddenly compressed to volume V₀/4. If γ is the ratio of specific heats, the final pressure is:

  Options

  • Option A

    P₀·4¹ᐟᵞ

  • Option B

    4P₀

  • Option C

    P₀

  • Option D

    P₀·4ᵞ

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• IntegermediumAtomic Structure and X-raysAtomic Structure & Bohr's Atomic Model

  An atom absorbs a photon of wavelength 500 nm and emits another photon of wavelength 600 nm. The net energy absorbed is n × 10⁻⁴ eV. Find n. Take h = 6.6 × 10⁻³⁴ J s and c = 3 × 10⁸ m s⁻¹.

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