JEE Mains 2024 04 Apr Morning Shift physics questions with solutions

Showing 1–10 of 30 questions

• NumericmediumProperties of solid and fluidproperties of fluid and surface tension

  A soap bubble is blown to a diameter of 7 cm. 36960 erg of work is done in blowing it further. If surface tension of soap solution is 40 dyne/cm then the new radius is ______ cm. Take π = 22/7.

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• MCQeasyGeometrical opticslens and combination lens,silvered lens

  An effective power of a combination of 5 identical convex lenses which are kept in contact along the principal axis is 25 D. Focal length of each of the convex lens is:

  Options

  • Option A

    20 cm

  • Option B

    50 cm

  • Option C

    500 cm

  • Option D

    25 cm

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• NumericmediumAc Cirucuitsavg value and rms value of ac

  An alternating current at any instant is given by i = [6 + √56 sin(100πt + π/3)] A. The rms value of the current is ______ A.

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• MCQmediumFluid Mechanicsequation of continuity and bornullie theorem

  Given below are two statements:

  Statement I: When speed of liquid is zero everywhere, pressure difference at any two points depends on equation P₁ - P₂ = ρg(h₂ - h₁)

  Statement II: In ventury tube shown, 2gh = v₁² - v₂²

  

  In the light of the above statements, choose the most appropriate answer from the options given below.

  Options

  • Option A

    Both Statement I and Statement II are correct.

  • Option B

    Statement I is incorrect but Statement II is correct.

  • Option C

    Both Statement I and Statement II are incorrect.

  • Option D

    Statement I is correct but Statement II is incorrect.

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• MCQeasyWork , Power and EnergySpring Energy and Conservation of Energy

  If a rubber ball falls from a height h and rebounds upto the height of h/2. The percentage loss of total energy of the initial system as well as velocity ball before it strikes the ground, respectively, are:

  Options

  • Option A

    50%, √(gh/2)

  • Option B

    50%, √(gh)

  • Option C

    40%, √(2gh)

  • Option D

    50%, √(2gh)

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• MCQmediumElectromagnetic wavedisplacement current and properties of electromagnetic wave

  The electric field in an electromagnetic wave is given by $\vec{E}$ = 40 cos[ω(t - z/c)] î N C⁻¹. The magnetic field induction of this wave is (in SI unit):

  Options

  • Option A

    $\vec{B}$ = (40/c) cos[ω(t - z/c)] î

  • Option B

    $\vec{B}$ = 40 cos[ω(t - z/c)] ĵ

  • Option C

    $\vec{B}$= (40/c) cos[ω(t - z/c)] k̂

  • Option D

    $\vec{B}$ = (40/c) cos[ω(t - z/c)] ĵ

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• MCQeasyThermodyanmicsheat and principle of calorimeter

  On celcius scale the temperature of body increases by 40°C. The increase in temperature on Fahrenheit scale is:

  Options

  • Option A

    70°F

  • Option B

    68°F

  • Option C

    72°F

  • Option D

    75°F

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• MCQmediumCurrent electricityelectric instruments

  To measure the internal resistance of a battery, potentiometer is used. For R = 10 Ω, the balance point is observed at ℓ = 500 cm and for R = 1 Ω the balance point is observed at ℓ = 400 cm. The internal resistance of the battery is approximately:

  Options

  • Option A

    0.2 Ω

  • Option B

    0.4 Ω

  • Option C

    0.1 Ω

  • Option D

    0.3 Ω

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• MCQmediumGeometrical opticslens and combination lens,silvered lens

  In an experiment to measure focal length (f) of convex lens, the least counts of the measuring scales for the position of object (u) and for the position of image (v) are Δu and Δv, respectively. The error in the measurement of the focal length of the convex lens will be:

  Options

  • Option A

    Δu/u + Δv/v

  • Option B

    f²[Δu/u² + Δv/v²]

  • Option C

    2f[Δu/u + Δv/v]

  • Option D

    f[Δu/u + Δv/v]

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• MCQeasyNewtons law of motion and Frictionnewton second law and problem based on it

  A wooden block, initially at rest on the ground, is pushed by a force which increases linearly with time t. Which of the following curve best describes acceleration of the block with time:

  Options

  • Option A

    
  • Option B

    
  • Option C

    
  • Option D

    

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