Electromagnetic Induction questions with solutions

Showing 1–10 of 64 questions

• MCQeasyElectromagnetic Inductionfaradays law and question based on it

  A square conducting loop of side 2 cm is placed in a time-varying uniform magnetic field B = 0.4 sin(300t) tesla. The normal to the plane of the loop makes an angle of 60° with the magnetic field. What is the maximum induced emf in the loop?

  Options

  • Option A

    12 mV

  • Option B

    18 mV

  • Option C

    21 mV

  • Option D

    24 mV

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  JEE Mains 2026 6 April Evening Shift

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• MCQmediumElectromagnetic InductionMutual induction and L-C oscillations,transformer

  Two conducting circular loops A and B are placed in the same plane with their centres coinciding as shown in figure. The mutual inductance between them is:

  

  Options

  • Option A

    μ₀πa²/(2b)

  • Option B

    μ₀b²/(2πa)

  • Option C

    μ₀πb²/(2a)

  • Option D

    μ₀a²/(2πb)

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  JEE Mains 2024 05 Apr Morning Shift

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• MCQeasyElectromagnetic Inductionfaradays law and question based on it

  A conducting loop of radius 10/√π cm is placed perpendicular to a uniform magnetic field of 0.5T. The magnetic field is decreased to zero in 0.5 s at a steady rate. The induced emf in the circular loop at 0.25 s is:

  Options

  • Option A

    emf = 1 mV

  • Option B

    emf = 10 mV

  • Option C

    emf = 100 mV

  • Option D

    emf = 5 mV

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  JEE Mains 2023 24 jan morning shift

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• MCQeasyElectromagnetic Inductionself induction and L-R circuit

  In a coil, the current changes form -2 A to +2 A in 0.2 s and induces an emf of 0.1 V. The self-inductance of the coil is :

  Options

  • Option A

    5 mH

  • Option B

    1 mH

  • Option C

    2.5 mH

  • Option D

    4 mH

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  JEE Mains 2024 06 Apr Evening Shift

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• NumericeasyElectromagnetic InductionMutual induction and L-C oscillations,transformer

  A power transmission line feeds input power at 2.3 kV to a step down transformer with its primary winding having 3000 turns. The output power is delivered at 230 V by the transformer. The current in the primary of the transformer is 5A and its efficiency is 90%. The winding of transformer is made of copper. The output current of transformer is_____A.

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  JEE Mains 2024 30 Jan Evening Shift

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• MCQmediumElectromagnetic Inductionmotional emf and induced emf in rotating rod

  A 20 m long uniform copper wire held horizontally is allowed to fall under the gravity (g = 10 m/s²) through a uniform horizontal magnetic field of 0.5 Gauss perpendicular to the length of the wire. The induced EMF across the wire it travells a vertical distance of 200 m is _____ mV.

  Options

  • Option A

    0.2√10

  • Option B

    20√10

  • Option C

    2√10

  • Option D

    200√10

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  JEE Mains 202623 January Morning Shift

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• MCQmediumElectromagnetic InductionMagnetic flux

  A coil is placed in a magnetic field such that its plane is perpendicular to the field. Magnetic flux through the coil can be changed by: A. changing the magnitude of B, B. changing the area of the coil within the field, C. changing the angle between the field and the plane of the coil, D. abruptly reversing the field direction without changing its magnitude. Choose the most appropriate answer.

  Options

  • Option A

    A and B only

  • Option B

    A, B and C only

  • Option C

    A, B and D only

  • Option D

    A and C only

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  JEE MainsJEE Advanced

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• A/ReasyElectromagnetic Inductionfaradays law and question based on it

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

  Assertion

  A bar magnet dropped through a metallic cylindrical pipe takes more time to come down than a non-magnetic bar of the same geometry and mass.

  Reason

  For the magnetic bar, eddy currents are induced in the metallic pipe and oppose the motion of the bar.

  Options

  • Option A

    A is true but R is false

  • Option B

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

  • Option C

    A is false but R is true

  • Option D

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

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  JEE Mains11 April 2023Shift 2Evening Shift

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• MCQmediumElectromagnetic InductionMutual induction and L-C oscillations,transformer

  A small circular loop of radius R is placed concentrically and coplanarly inside a much larger square loop of side L, where L is much greater than R. What is the mutual inductance between the two loops? Take the permeability of free space as μ₀.

  Options

  • Option A

    2√2 μ₀L² /R

  • Option B

    √2 μ₀L² /R

  • Option C

    2 μ₀R² / L

  • Option D

    2√2 μ₀R² / L

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  JEE Mains 2026 2 April Evening Shift

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• NumericmediumElectromagnetic Inductionfaradays law and question based on it

  A coil of 200 turns and area 0.20 m² is rotated at half a revolution per second and is placed in uniform magnetic field of 0.01 T perpendicular to axis of rotation of the coil. The maximum voltage generated in the coil is (2π/β) volt. The value of β is ____.

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  JEE Mains 2024 01 Feb Evening Shift

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