JEE mains physics questions with solutions

Showing 1–10 of 6663 questions

• MCQmediumMagnetism and mattermagnet in magnetic field, torque, potential energy, oscillation and magnetic moment

  A magnet of magnetic moment M and moment of inertia I oscillates with time period T in a uniform magnetic field B. It is replaced by another magnet having magnetic moment 4M and moment of inertia 9I.

  The time period of the new magnet is:

  Options

  • Option A

    3T/2

  • Option B

    3T/4

  • Option C

    2T/3

  • Option D

    3T

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• IntegermediumMathematical tools and vectorGeometry & Mensuration

  A bucket is in the shape of a frustum with top radius 6 cm, bottom radius 3 cm and height 4 cm. Find its volume in units of π cm³.

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• MCQmediumGeometrical opticsprism and thin prism

  A ray enters normally through one face of a 50° prism of refractive index 1.50 in air. Which conclusion is correct?

  Options

  • Option A

    TIR occurs at the second face

  • Option B

    The ray emerges from the second face

  • Option C

    The ray grazes the second face

  • Option D

    The first face causes a 50° deviation

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• IntegermediumFluid Mechanicsequation of continuity and bornullie theorem

  Glycerine of density 1.25 × 10³ kg m⁻³ flows through a conical pipe. End areas are 10 cm² and 5 cm², and pressure drop is 3 N m⁻². The volume-flow rate is x × 10⁻⁵ m³ s⁻¹. Find x.

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  JEE Mains12 April 2023Shift 1Morning Shift

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• MCQmediumThermodynamics

  ‘Gulab Jamuns’ (assumed to be spherical) are to be heated in an oven. They are available in two sizes, one twice bigger (in radius) than the other. Pizzas (assumed to be discs) are also to be heated in oven. They are also in two sizes, one twice big (in radius) than the other. All four are put together to be heated to oven temperature. Choose the correct option from the following:

  Options

  • Option A

    Both size gulab jamuns will get heated in the same time.

  • Option B

    Smaller gulab jamuns are heated before bigger ones.

  • Option C

    Smaller pizzas are heated before bigger ones.

  • Option D

    Bigger pizzas are heated before smaller ones.

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• NumericmediumGeometrical opticslaw of reflection and plane mirror

  A stationary object is initially 2 m from a plane mirror. The mirror moves normally away from the object at 0.5 m/s for 4 s. By how many metres does the object-image separation increase?

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• MCQmediumCurrent electricityElectric Current, Drift Velocity & Resistance

  Two long straight cylindrical conductors with resistivities ρ₁ and ρ₂ respectively are joined together as shown in the figure. If current I flows through the conductors, the magnitude of the total free charge at the interface of the two conductors is:

  

  Options

  • Option A

    Zero

  • Option B

    (ρ₁-ρ₂)Iε₀/2

  • Option C

    ε₀I(ρ₁-ρ₂)

  • Option D

    ε₀I(ρ₁+ρ₂)

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• MCQmediumThermodynamicsfirst law of thermodynamics

  The pressure of a gas changes linearly with volume from A to B as shown in figure. If no heat is supplied to or extracted from the gas then change in the internal energy of the gas will be:

  

  Options

  • Option A

    6 J

  • Option B

    Zero

  • Option C

    -4.5 J

  • Option D

    4.5 J

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  JEE Mains31 January 2023Shift 1Morning Shift

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• MCQmediumMathematical tools and vectorApplications of Differentiation

  The radius of a circle decreases at 2 cm s⁻¹. Find dA/dt when r = 5 cm.

  Options

  • Option A

    -20π cm² s⁻¹

  • Option B

    20π cm² s⁻¹

  • Option C

    -10π cm² s⁻¹

  • Option D

    -25π cm² s⁻¹

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• MCQmediumNewtons law of motion and FrictionPseudo force related problem

  A 2 kg object moves with constant velocity 10î m s⁻¹ and is observed from a frame moving with constant velocity 10î m s⁻¹. The pseudo force on the object in this frame is:

  Options

  • Option A

    0

  • Option B

    20 N along +x

  • Option C

    20 N along -x

  • Option D

    Depends on time

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