JEE Advanced Practice physics questions with solutions

Showing 1–10 of 47 questions

• MCQmediumFluid Mechanics

  Fountains usually seen in gardens are generated by a wide pipe with an enclosure at one end having many small holes. Consider one such fountain which is produced by a pipe of internal diameter 2 cm in which water flows at a rate 3 m s⁻¹. The enclosure has 100 holes each of diameter 0.05 cm. The velocity of water coming out of the holes is (in m s⁻¹):

  Options

  • Option A

    0.48

  • Option B

    96

  • Option C

    24

  • Option D

    48

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• Multi-correctmediumAtomic Structure and X-rays

  An X-ray tube is operating at 50 kV and 10 mA. The target material of the tube has mass of 1 kg and specific heat 495 J kg⁻¹°C⁻¹. One percent of applied electric power is converted into X-rays and the remaining energy goes into heating the target. Then :

  Select all that apply

  • Option A

    a suitable target material must have high melting temperature

  • Option B

    a suitable target material must have low thermal conductivity

  • Option C

    the average rate of rise of temperature of the target would be 1°C/sec

  • Option D

    the minimum wavelength of X-rays emitted is about 0.25 × 10⁻¹⁰ m

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• MCQmediumWave Motion

  The shape of a wave propagating in the positive x or negative x- direction is given y = $\frac{1}{\sqrt{1+x^2}}$ at t = 0 and y = $\frac{1}{\sqrt{2-2x+x^2}}$ at t = 1s where x and y are in meters. The shape the wave disturbance does not change during propagation. Find the velocity of the wave.

  Options

  • Option A

    1 m s⁻¹ in +x direction

  • Option B

    1 m s⁻¹ in -x direction

  • Option C

    ½ m s⁻¹ in +x direction

  • Option D

    ½ m s⁻¹ in -x direction

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• NumericmediumAtomic Structure and X-rays

  Find the ratio of the centripetal acceleration of the electron in ground-state He⁺ to that in ground-state H.

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• MCQmediumNuclear physics

  The binding energies of the atom of elements A and B are Ea and Eb respectively. Three atoms of the element B fuse to give one atom of element A. This fusion process is accompanied by release of energy e. Then Ea, Eb are related to each other as

  Options

  • Option A

    Ea + e = 3Eb

  • Option B

    Ea = 3Eb

  • Option C

    Ea - e = 3Eb

  • Option D

    Ea + 3Eb + e = 0 M₃M

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• Multi-correctmediumWave Motion

  Three coherent sources S₁, S₂ and S₃ each produce intensity I₀ at P. With S₁ and S₂ on, intensity at P is 2I₀; with S₂ and S₃ on, it is also 2I₀. Select the correct possibilities.

  Select all that apply

  • Option A

    When S₁ and S₃ are switched on simultaneously, intensity at point P can be 2I₀

  • Option B

    When S₁ and S₃ are switched on simultaneously, intensity at point P can be 0

  • Option C

    When all 3 sources are switched on simultaneously, intensity at point P can be I₀

  • Option D

    When all 3 sources are switched on simultaneously, intensity at point P can be 3I₀

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• Multi-correctmediumAtomic Structure and X-rays

  Image. Continuous X-ray spectra for three accelerating voltages V₁, V₂, V₃ are shown, with filament temperatures T₁, T₂, T₃. Select the correct relations.

  Select all that apply

  • Option A

    V₁ > V₂ > V₃

  • Option B

    T₁ > T₂ > T₃

  • Option C

    V₁ = V₂ = V₃

  • Option D

    T₁ < T₂ < T₃

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• Multi-correctmediumWave Motion

  Curve 'y-x' at an instant for a wave travelling along x-axis on a string is shown. Slope at the point A on the curve, as shown, is 53°.

  

  Select all that apply

  • Option A

    Transverse velocity of the particle at point A is positive if the wave is travelling along positive x-axis.

  • Option B

    Transverse velocity of the particle at point A is positive if the wave is travelling along negative x-axis of the particle at point A

  • Option C

    Magnitude of transverse velocity of the particle at point A is greater than wave speed.

  • Option D

    Magnitude of transverse velocity of the particle at point A is lesser than wave speed.

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• Multi-correctmediumAtomic Structure and X-rays

  Image. The X-ray intensity spectrum is shown for tube voltage V and target atomic number Z. If these change to V₁ and Z₁, select the correct statements.

  Select all that apply

  • Option A

    If V₁>V and Z₁=Z, λₘ decreases while characteristic λ′ remains unchanged.

  • Option B

    If V₁>V and Z₁=Z, both λₘ and λ′ decrease.

  • Option C

    If V₁=V and Z₁>Z, λₘ is unchanged while λ′ decreases.

  • Option D

    If V₁>V and Z₁>Z, both λₘ and λ′ decrease.

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• Multi-correctmediumWave Motion

  Sound waves from different source are interfering and pressure at same point in space is given as- P = P₀ sin(200πt + π/2) cos(3πt + π/3)

  Select all that apply

  • Option A

    The frequency of one source is above 100Hz and other source is below 100Hz.

  • Option B

    Beat frequency is 3 Hz

  • Option C

    Beat frequency is 200 Hz

  • Option D

    Beat frequency can be 3 Hz as well as 200 Hz

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