6 April 2023 physics questions with solutions

Showing 1–10 of 58 questions

• A/RmediumsemiconductorP–N Junction Diode & Forward–Reverse Bias

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

  Assertion

  Diffusion current in a p-n junction is greater than the drift current in magnitude if the junction is forward biased.

  Reason

  Diffusion current in a p-n junction is from the n-side to the p-side if the junction is forward biased.

  Options

  • Option A

    A is not correct but R is 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 correct but R is not correct

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  JEE Mains6 April 2023Shift 2Evening Shift

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• MCQeasyGravitationSatellites, Orbital Motion & Kepler’s Laws

  Choose the incorrect statement from the following:

  Options

  • Option A

    The linear speed of a planet revolving around the sun remains constant.

  • Option B

    The speed of satellite in a given circular orbit remains constant.

  • Option C

    When a body falls towards earth, the displacement of earth towards the body is negligible.

  • Option D

    For a planet revolving around the sun in an elliptical orbit, the total energy of the planet remains constant.

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  JEE Mains6 April 2023Shift 2Evening Shift

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

  As shown in the figure, the voltmeter reads 2 V across the 5 Ω resistor. The resistance of the voltmeter is ______ Ω.

  

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  JEE Mains6 April 2023Shift 2Evening Shift

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

  A proton of kinetic energy 2.0 eV enters a uniform magnetic field B = (π/2) × 10⁻³ T at 60° to the field. The pitch of the helical path is ______ cm. [mₚ = 1.6 × 10⁻²⁷ kg, q = 1.6 × 10⁻¹⁹ C]

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  JEE Mains6 April 2023Shift 2Evening Shift

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

  The energy levels of an hydrogen atom are shown below. The transition corresponding to emission of shortest wavelength is

  

  Options

  • Option A

    A

  • Option B

    D

  • Option C

    C

  • Option D

    B

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  JEE Mains6 April 2023Shift 1Morning Shift

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• MCQmediumKinematics Part-1 (one dimension)Instantaneous speed and instantaneous velocity

  A particle is moving with constant speed in a circular path. When the particle turns by an angle $90^{o}$, the ratio of instantaneous velocity to its average velocity is π: x $\sqrt2$. The value of x will be -

  Options

  • Option A

    7

  • Option B

    2

  • Option C

    1

  • Option D

    5

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  JEE Mains6 April 2023Shift 1Morning Shift

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• A/RmediumGravitationAcceleration Due to Gravity & Escape Velocity

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

  Assertion

  Earth has atmosphere whereas moon doesn't have any atmosphere.

  Reason

  The escape velocity on moon is very small as compared to that on earth.

  Options

  • Option A

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

  • Option B

    A is false but R is true

  • Option C

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

  • Option D

    A is true but R is false

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

  A small particle of mass m has potential energy U = (1/2)mω²r², where ω is constant and r is distance from origin. Assuming Bohr quantization and a circular orbit, the radius of the nth orbit is proportional to:

  Options

  • Option A

    n

  • Option B

    n²

  • Option C

    1/n

  • Option D

    √n

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  JEE Mains6 April 2023Shift 2Evening Shift

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• NumericmediumGeometrical opticsLaws of Refraction & Total Internal Reflection

  A pole is vertically submerged in swimming pool, such that it gives a length of shadow 2.15 m within water when sunlight is incident at an angle of $30^0$ with the surface of water. If swimming pool is filled to a height of 1.5 m, then the height of the pole above the water surface in centimeters is (nw = 4/3) ____________

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• MCQmediumGeometrical opticsLaws of Refraction & Total Internal Reflection

  A monochromatic light wave with wavelength λ₁ and frequency ν₁ in air enters another medium. If the angle of incidence and angle of refraction at the interface are 45° and 30° respectively, then the wavelength λ₂ and frequency ν₂ of the refracted wave are:

  Options

  • Option A

    λ₂ = λ₁/√2, ν₂ = ν₁

  • Option B

    λ₂ = λ₁, ν₂ = ν₁/√2

  • Option C

    λ₂ = λ₁, ν₂ = √2ν₁

  • Option D

    λ₂ = √2λ₁, ν₂ = ν₁

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  JEE Mains6 April 2023Shift 1Morning Shift

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