ICS Part 2 Physics Chapter 15 Short Questions Preparation


12th Class Physics
Short Questions Preparation

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Online Short Questions For Chapter 4 "ICS Part 2 Physics Chapter 15 Short Questions Preparation "

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Physics - ICS Part 2 Physics Chapter 15 Short Questions Preparation

Question # 1

What is back emf in motors?

  • Ans 1: When to coil motor rotates across the magnetic field by the applied potential difference V,an emf is induced in it.The induced emf is in such a direction that opposes the emf running motor.Due to this reasons,the induced emf is called back emf of the motor.The magnitude of the back emf increase with the speed of motor.
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Prepare Complete Set Wise Questions For Chapter 4 "ICS Part 2 Physics Chapter 15 Short Questions Preparation "

ICS Part 2 Physics Chapter 15 Short Questions Preparation - Set 1

Question # 1

What is back emf in motors?

  • Ans 1: When to coil motor rotates across the magnetic field by the applied potential difference V,an emf is induced in it.The induced emf is in such a direction that opposes the emf running motor.Due to this reasons,the induced emf is called back emf of the motor.The magnitude of the back emf increase with the speed of motor.
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ICS Part 2 Physics Chapter 15 Short Questions Preparation - Set 2

Question # 1

Define mutual induction.

  • Ans 1: The phenomena in which the changing current in one coil induces an emd in another coil is called the mutual induction.
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ICS Part 2 Physics Chapter 15 Short Questions Preparation - Set 3

Question # 1

How the power is lost due to eddy current in a transformer and how this loss can be minimized?

  • Ans 1: The induced currents that are set up in the core of transformer in the direction perpendicular to the flux are known as eddy currents,It results in power dissipation and heating of the coral material.The insulation between lamination sheets should be perfect so as to stop the flow of eddy currents.
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ICS Part 2 Physics Chapter 15 Short Questions Preparation - Set 4

Question # 1

Name four methods to produce induce emf.

  • Ans 1: An induce emf is produced in the loop if the magnetic flux through it changes.The methods to produce induced emf are:
    1. A bar magnet is moved towards the coil.
    2. By changing the area of the coil in a constant magnetic field.
    3. A coil of constant area is rotated in a constant magnetic field,
    4. The coil is placed in the magnetic field of an electromagnet.

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ICS Part 2 Physics Chapter 15 Short Questions Preparation

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