JEE Mains 2024 27 Jan Evening Shift physics questions with solutions

Showing 1–10 of 30 questions

• MCQeasyNewtons law of motion and FrictionTypes of Friction & Applications

  Given below are two statements : Statement (I) : The limiting force of static friction depends on the area of contact and independent of materials. Statement (II) : The limiting force of kinetic friction is independent of the area of contact and depends on materials. In the light of the above statements, choose the most appropriate answer from the options given below :

  Options

  • Option A

    Statement I is correct but Statement II is incorrect

  • Option B

    Statement I is incorrect but Statement II is correct

  • Option C

    Both Statement I and Statement II are incorrect

  • Option D

    Both Statement I and Statement II are correct

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• MCQeasyPhotoelectric effect and dual naturePhotoelectric Effect & Einstein's Equation

  The threshold frequency of a metal with work function 6.63 eV is :

  Options

  • Option A

    16 × 10¹⁵ Hz

  • Option B

    16 × 10¹² Hz

  • Option C

    1.6 × 10¹² Hz

  • Option D

    1.6 × 10¹⁵ Hz

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• MCQmediumThermodynamicsThermodynamic Processes, P-V Diagrams and Work Done

  During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio of Cₚ/Cᵥ for the gas is :

  Options

  • Option A

    5/3

  • Option B

    3/2

  • Option C

    7/5

  • Option D

    9/7

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• NumericmediumAC CircuitsSeries AC Circuits: Impedance, Phase Difference, Resonance and Power Factor

  A series LCR circuit with L = 100/π mH, C = 10⁻³/π F and R = 10 Ω, is connected across an ac source of 220 V, 50 Hz supply. The power factor of the circuit would be ________.

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• NumericmediumWave MotionStanding Sound Waves, Organ Pipes and Resonance Tubes

  A closed organ pipe 150 cm long gives 7 beats per second with an open organ pipe of length 350 cm, both vibrating in fundamental mode. The velocity of sound is ________ m/s.

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• MCQeasyCurrent electricityElectrical Instruments: Galvanometer, Ammeter, Voltmeter & Potentiometer

  Wheatstone bridge principle is used to measure the specific resistance (S₁) of given wire, having length L, radius r. If X is the resistance of wire, then specific resistance is : S₁ = X(πr²/L). If the length of the wire gets doubled then the value of specific resistance will be :

  Options

  • Option A

    S₁/4

  • Option B

    2S₁

  • Option C

    S₁/2

  • Option D

    S₁

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• MCQeasyMagnetic effect of currentMagnetic Dipole Moment, Torque and Equilibrium of Current-Carrying Loops

  A current of 200 μA deflects the coil of a moving coil galvanometer through 60°. The current to cause deflection through π/10 radian is :

  Options

  • Option A

    30 μA

  • Option B

    120 μA

  • Option C

    60 μA

  • Option D

    180 μA

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• A/ReasyCircular MotionKinematics of Circular Motion

  Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R ). In the light of the above statements, choose the most appropriate answer from the options given below :

  Assertion

  Assertion (A) : The angular speed of the moon in its orbit about the earth is more than the angular speed of the earth in its orbit about the sun.

  Reason

  Reason (R) : The moon takes less time to move around the earth than the time taken by the earth to move around the sun.

  Options

  • Option A

    (A) is correct but (R) is not correct

  • Option B

    Both (A) and (R) are correct and (R) is the correct explanation of (A)

  • Option C

    Both (A) and (R) are correct but (R) is not the correct explanation of (A)

  • Option D

    (A) is not correct but (R) is correct

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• NumericmediumElectrostaticElectric Dipole & Dipole Moment

  Two charges of -4 μC and +4 μC are placed at the points A(1, 0, 4)m and B(2, -1, 5) m located in an electric field $\vec{E}$= 0.20 î V/cm. The magnitude of the torque acting on the dipole is 8√α × 10⁻⁵ Nm, Where α = _____.

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• MCQmediumWave OpticsPolarisation of Light

  When a polaroid sheet is rotated between two crossed polaroids then the transmitted light intensity will be maximum for a rotation of :

  Options

  • Option A

    60°

  • Option B

    30°

  • Option C

    90°

  • Option D

    45°

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