JEE Mains 2025 24 Jan Evening Shift physics questions with solutions

Showing 1–10 of 15 questions

• MCQmediumThermodyanmicsheat transfer due to radiation

  A body cools from 40°C to 24°C in 4 min in surroundings at 16°C. Using the same Newton's-law-of-cooling approximation as the source solution, its temperature after a further 4 min is:

  Options

  • Option A

    20°C

  • Option B

    22°C

  • Option C

    56/3 °C

  • Option D

    17°C

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• MCQeasysemiconductorlogic gate

  A logic circuit consists of an OR gate followed by a NOT operation (NOR). For which inputs is the output zero? A:(0,0), B:(0,1), C:(1,0), D:(1,1).

  

  Options

  • Option A

    A only

  • Option B

    A, B, C only

  • Option C

    B, C, D only

  • Option D

    A and C

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• MCQeasyRotational Motioncombined translatory and rotatory motion ,Pure rolling motion

  A solid sphere rolls without slipping on a horizontal plane. The ratio of translational kinetic energy to rotational kinetic energy is:

  Options

  • Option A

    4/3

  • Option B

    $\frac{3}{4}$

  • Option C

    2/5

  • Option D

    5/2

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• MCQmediumMagnetic effect of currentampere's law and its application

  A long solid cylindrical conductor carries current uniformly along its axis. Which graph correctly describes magnetic field B versus radial distance r?

  Options

  • Option A
    
  • Option B
    
  • Option C
    
  • Option D
    

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• MCQeasyCircular Motioncentripital force and centrifugal force

  A conical pendulum of mass m has its string making 60° with the vertical. The tension in the string is:

  Options

  • Option A

    mg

  • Option B

    mg/2

  • Option C

    2mg

  • Option D

    3mg

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• MCQeasyUnit dimension and errorDimension and its application

  If E, p, m and c denote energy, linear momentum, mass and speed of light respectively, which relation is dimensionally correct?

  Options

  • Option A

    E²=p²c²+m²c⁴

  • Option B

    E²=pc²+m²c⁴

  • Option C

    E=p²c²+m²c²

  • Option D

    E²=pc²+m²c²

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• MCQeasyRotational Motionrolling on inclined surface

  A solid sphere and a hollow sphere roll without slipping from rest through equal distances on the same inclined plane. If their times are t₁ and t₂ respectively, then:

  Options

  • Option A

    t₁ > t₂

  • Option B

    t₁ < t₂

  • Option C

    t₁ = 2t₂

  • Option D

    t₁ = t₂

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• MCQeasyElectromagnetic wavedisplacement current and properties of electromagnetic wave

  Arrange the following electromagnetic waves in decreasing order of wavelength: a. Microwave, b. Ultraviolet, c. Infrared, d. X-rays.

  Options

  • Option A

    a>b>c>d

  • Option B

    d>c>b>a

  • Option C

    a>c>b>d

  • Option D

    c>a>b>d

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• MCQmediumElectrostaticselectric charge and coulamb's law

  Two identical conducting spheres are separated by distance l. One carries charge 4×10⁻⁸ C and the other is neutral. They are connected by a conducting wire and then the force between them is 9×10⁻³ N. Find l.

  Options

  • Option A

    4 cm

  • Option B

    4 m

  • Option C

    2 cm

  • Option D

    1 cm

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

  The position of a particle is $\vec{r}$=(5t² î-5t ĵ) m. The magnitude and direction of its velocity at t=1/2 s are:

  Options

  • Option A

    5√2 m/s, -45° with +X-axis

  • Option B

    5 m/s, -45° with +X-axis

  • Option C

    5√2 m/s, -45° with +Y-axis

  • Option D

    5 m/s, +45° with +Y-axis

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