Electromagnetic Induction

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Question 1

Which of the following is the basic principle behind electromagnetic induction?

  • Coulomb's Law

  • Faraday's Law

  • Ohm's Law

  • Ampere's Law

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Question 2

The induced current in a coil will be greater if the rate of change of magnetic flux is:

  • Decreased

  • Increased

  • Remains constant

  • Zero

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Question 3

What is the unit of magnetic flux?

  • Ampere

  • Tesla

  • Weber

  • Joule

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Question 4

According to Lenz's Law, the direction of the induced current is such that:

  • It opposes the change in magnetic flux

  • It enhances the change in magnetic flux

  • It increases the magnetic field

  • It has no effect on the flux

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Question 5

Which of the following is NOT a method to induce current in a conductor?

  • Moving a magnet through a coil

  • Moving a conductor in a magnetic field

  • Changing the area of the coil in a magnetic field

  • Using a battery to create a constant magnetic field

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Question 6

If a conductor is moving parallel to a magnetic field, what will be the induced EMF?

  • Maximum

  • Minimum

  • Zero

  • Depends on the speed of the conductor

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Question 7

The direction of the induced current in a loop of wire can be determined by:

  • Right-hand Rule

  • Left-hand Rule

  • Fleming’s Right-Hand Rule

  • Fleming’s Left-Hand Rule

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Question 8

The phenomenon of electromagnetic induction is the basis for the working of which device?

  • Electric Motor

  • Transformer

  • Capacitor

  • Diode

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Question 9

Which of the following correctly explains the relationship between induced EMF and the rate of change of magnetic flux?

  • Induced EMF is proportional to the magnetic field only.

  • Induced EMF is inversely proportional to the rate of change of magnetic flux.

  • Induced EMF is proportional to the rate of change of magnetic flux.

  • Induced EMF depends on coil size, not flux change.

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Question 10

When a magnet is moved towards a coil, which of the following describes the direction of the induced current?

  • The induced current flows in the same direction as the magnet’s motion.

  • The induced current flows in the opposite direction to the magnet’s motion.

  • The induced current does not depend on the magnet’s motion.

  • The induced current is zero unless the magnet is stationary.

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Physics

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