Online Short Questions Preparations

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

Try The Short Questions For ICS Part 2 Physics Chapter 15 Short Questions Preparation

  • Total Questions10

  • Available Sets4

Start Test Download PDF

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.
Submit

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.
Submit

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

Question # 1

What is the working principle of transformer?Explain

  • Ans 1: The transformer work on the principle of mutual induction between two coils.The transformer consists of two coils of copper electrically insulated from each other,wound on the same iron core,The coil to which AC power is supplied is called primary and that from which power is delivered to the circuit is called secondary.
Submit

ICS Part 2 Physics Chapter 15 Short Questions Preparation - Set 3

Question # 1

A suspended magnet is oscillating freely in the horizontal plane.The oscillation are strongly damped when a metal plate is placed under,The magnet.Explain why its occurs.

  • Ans 1: The oscillating magnet produces change of magnetic flux close to it.The metal plate placed below it experiences the change the magnetic flux,As the result eddy currents are produced inside the metal.According to Lenz's law these eddy currents oppose the cause which produce it,So the oscillation of magnet are strongly damped.
Submit

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.

Submit

Is this page helpful?