JEE Mains physics questions with solutions

Showing 1–10 of 3248 questions

• MCQmediumElectromagnetic Inductionmotional emf and induced emf in rotating rod

  A metallic rod of length 'L' is rotated with an angular speed of ‘ω’ normal to a uniform magnetic field 'B' about an axis passing through one end of rod as shown in figure. The induced emf will be :

  

  Options

  • Option A

    (1/4)B²Lω

  • Option B

    (1/4)BL²ω

  • Option C

    (1/2)BL²ω

  • Option D

    (1/2)B²L²ω

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  JEE Mains24 January 2023Shift 2Evening Shift

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• A/ReasyCircular Motion

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

  Assertion

  If dQ and dW represent the heat supplied to the system and the work done on the system respectively, then according to the first law of thermodynamics dQ = dU - dW.

  Reason

  First law of thermodynamics is based on law of conservation of energy.

  Options

  • Option A

    A is correct but R is not correct

  • Option B

    A is not correct but R is correct

  • Option C

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

  • Option D

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

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  JEE Mains29 January 2023Shift 1Morning Shift

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• MCQmediumMathematical tools and vectorVector

  A particle moves 6 m east, 8 m north and then 6 m west. Its resultant displacement is:

  Options

  • Option A

    8 m north

  • Option B

    8 m south

  • Option C

    12 m east

  • Option D

    10 m north-east

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• MCQeasyCircular Motion

  If a radioactive element having half-life of 30 min is undergoing beta decay, the fraction of radioactive element remains undecayed after 90 min will be:

  Options

  • Option A

    1/8

  • Option B

    1/16

  • Option C

    1/4

  • Option D

    1/2

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  JEE Mains29 January 2023Shift 1Morning Shift

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• MCQeasyMathematical tools and vectorCoordinate Geometry

  Find the slope of the line 3x - 4y + 12 = 0.

  Options

  • Option A

    -$\frac{3}{4}$

  • Option B

    $\frac{3}{4}$

  • Option C

    4/3

  • Option D

    -4/3

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• NumericeasyElectromagnetic wavedisplacement current and properties of electromagnetic wave

  The electric-field amplitude of an electromagnetic wave becomes three times its initial value while the medium remains unchanged. If the new average intensity is N times the original intensity, find N.

  Your answer

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  JEE MainsNEETJEE Advanced

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• MCQmediumSimple Harmonic Motiondisplacement ,velocity and acceleration ,phasor diagram

  Two particles execute SHM on the same line with x₁ = A sinωt and x₂ = A cosωt. What is the first positive time at which their velocities are equal in both magnitude and direction?

  Options

  • Option A

    T/8

  • Option B

    T/4

  • Option C

    3T/8

  • Option D

    T/2

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• MCQdifficultMathematical tools and vectorSequence & Series

  A ball is dropped from a height of 20 m. After each bounce it rises to one-fourth of the previous height. Find the total vertical distance travelled before it effectively comes to rest.

  Options

  • Option A

    80/3 m

  • Option B

    100/3 m

  • Option C

    40 m

  • Option D

    50 m

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  NEETJEE Mains

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• NumericeasyCenter of maas , Momentum and Collisioncenter of mass and question based on it

  Two particles of masses 2m and 3m are connected by a light spring and are initially at rest on a smooth horizontal surface, separated by 5 m. The spring pulls them toward each other until they meet. If the 2m particle moves a distance N m before meeting, find N.

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  JEE MainsNEETJEE Advanced

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• MCQmediumCircular Motion

  The equivalent resistance between A and B of the network shown in figure is: Image

  Options

  • Option A

    (11/3)R

  • Option B

    14R

  • Option C

    21R

  • Option D

    (8/3)R

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  JEE Mains1 February 2023Shift 1Morning Shift

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