Electromagnetic Induction Quiz for Class 12 Students
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Questions and Answers

What is the magnetic flux linked with any surface equal to?

  • The area of the surface
  • The strength of the magnetic field passing through it
  • Total number of magnetic lines of force passing tangentially through it
  • Total number of magnetic lines of force passing normally through it (correct)

    • What is Faraday's First Law of Electromagnetic Induction about?

  • The number of turns in a loop when magnetic flux changes
  • An emf induces in the loop or circuit when magnetic flux linked with it changes (correct)
  • The resistance of a coil when magnetic flux changes
  • The direction of induced emf or induced current

    • What does Lenz's Law state about the direction of induced emf or induced current?

  • It always supports the cause that produces it
  • It is independent of the cause that produces it
  • It follows the same direction as the cause that produces it
  • It always opposes the cause that produces it (correct)

    • What is the induced emf in a closed loop or circuit directly proportional to?

    <p>Rate of change of magnetic flux linked with the closed loop or circuit</p> Signup and view all the answers

    What is the phenomenon of generation of current or emf by changing the magnetic flux known as?

    <p>Electromagnetic Induction (EMI)</p> Signup and view all the answers

    Study Notes

    Magnetic Flux and Electromagnetic Induction

    • Magnetic flux linked with any surface is equal to the product of the magnetic field strength, the area of the surface, and the cosine of the angle between the normal to the surface and the magnetic field.

    Faraday's Laws of Electromagnetic Induction

    • Faraday's First Law of Electromagnetic Induction states that whenever there is a change in the magnetic flux linked with a circuit, an induced emf is generated.

    Lenz's Law

    • Lenz's Law states that the direction of induced emf or induced current is such that it opposes the change in the magnetic flux that produced it.

    Induced Emf

    • The induced emf in a closed loop or circuit is directly proportional to the rate of change of the magnetic flux linked with the circuit.

    Electromagnetic Induction

    • The phenomenon of generation of current or emf by changing the magnetic flux is known as Electromagnetic Induction.

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    Description

    Test your understanding of electromagnetic induction with this quiz. Explore concepts such as magnetic flux, electromagnetic induction, and the generation of current and emf. Ideal for Class 12 students studying Chapter 6 on electromagnetic induction.

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