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Question

Lenz's law applies to


A

Electrostatics

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B

Lenses

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C

Electromagnetic induction

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D

Cinema slides

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Solution

The correct option is C

Electromagnetic induction


The explanation for the correct option

In the case of option C,

  1. Lenz's Law applies to electromagnetic induction.
  2. According to Lenz's law, when an emf is induced in a coil by changing the magnetic flux linked to the coil with time, then the emf will oppose the induced current in the coil.

The explanation for the incorrect options

In the case of option A,

  1. Coulomb's law applies to electrostatics.
  2. It deals with electrostatic force between any two-point charges or for a system of charges.
  3. Hence, option A is incorrect.

In the case of option B,

  1. Lenses are the optical devices, it deals with ray optics.
  2. Lenses are the application of the refraction of light rays.
  3. Hence, option B is incorrect.

In the case of option D,

  1. Cinema slides are such a slide projector that is used to show photographic slides.
  2. Optical and mechanical methods are used in cinema slides.
  3. Hence, option D is incorrect.

Hence, option C is the correct answer.


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