13 April 2023 Evening Shift physics questions with solutions

Showing 1–10 of 29 questions

• IntegermediumGeometrical opticslens and combination lens,silvered lens

  A biconvex lens of focal length 10 cm is cut into two identical parts by a plane perpendicular to its principal axis. Find the power of each part in dioptres.

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• MCQmediumGravitationacceleration due to gravity and escape velocity

  Two planets A and B have radii R and 1.5R and densities ρ and ρ/2 respectively. The ratio of acceleration due to gravity at the surface of B to that at A is:

  Options

  • Option A

    2 : 3

  • Option B

    2 : 1

  • Option C

    4 : 3

  • Option D

    3 : 4

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• IntegereasyWork , Power and Energykinetic enegy and work engery 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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• IntegermediumThermodyanmicsheat transfer in solid and liquid

  Two plates A and B have thermal conductivities 84 W m⁻¹ K⁻¹ and 126 W m⁻¹ K⁻¹. They have equal thickness and area and are placed in contact. Their outer faces are maintained at 100°C and 0°C. Find the steady interface temperature in °C.

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• MCQeasyGravitationacceleration due to gravity and escape velocity

  Given below are two statements:

  Statement I: For a planet, if the ratio M/R increases, the escape velocity also increases.

  Statement II: Escape velocity is independent of planet radius. Choose the correct answer.

  Options

  • Option A

    Both Statement I and Statement II are correct

  • Option B

    Statement I is correct but Statement II is incorrect

  • Option C

    Statement I is incorrect but Statement II is correct

  • Option D

    Both Statement I and Statement II are incorrect

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• IntegereasyRotational Motionrotational constrain motion

  A light rope is wound around a hollow cylinder of mass 5 kg and radius 70 cm. The rope is pulled by a force 52.5 N. Find the angular acceleration in rad s⁻².

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• IntegermediumCapacitorRC circuit

  In the shown circuit, the energy stored in the 6 μF capacitor is n μJ. Find n.

  

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• MCQmediumThermodyanmicskinetic therory of gaseous

  The mean free path of molecules of a gas at STP is 1500d, where d is the molecular diameter. At the same pressure, the mean free path at 373 K is approximately:

  Options

  • Option A

    750d

  • Option B

    1500d

  • Option C

    1098d

  • Option D

    2049d

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• MCQeasyKinematics part-3 Relative motionRelative motion in one dimension

  A passenger in train A moving at 90 km h⁻¹ observes train B moving in the opposite direction for 8 s. If train B moves at 54 km h⁻¹, the length of train B is:

  Options

  • Option A

    120 m

  • Option B

    200 m

  • Option C

    320 m

  • Option D

    80 m

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• IntegermediumElectrostaticselectric charge and coulamb's law

  Three point charges q, -2q and 2q are placed on the x-axis at x = 0, x = 3R/4 and x = R respectively. If q = 2 × 10⁻⁶ C and R = 2 cm, find the magnitude of net force on the charge -2q, in newtons.

  

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