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12th Class Physics
Short Questions Preparation
Start Chapter 15 Preparation
12th Class Physics Chapter Wise Preparation
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
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Total Questions10
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Available Sets4
Physics - ICS Part 2 Physics Chapter 15 Short Questions Preparation
Question # 1
Define induced emf and induced current.
- Ans 1: If a conductor moves through a magnetic field then due to change in magnetic flux,an emf is induced across the ends of the conductor which is known as back emf.If the circuit is close it will cause an electric current which is called as induced current.
ICS Part 2 Physics Chapter 15 Short Questions Preparation - Set 1
Question # 1
Define induced emf and induced current.
- Ans 1: If a conductor moves through a magnetic field then due to change in magnetic flux,an emf is induced across the ends of the conductor which is known as back emf.If the circuit is close it will cause an electric current which is called as induced current.
ICS Part 2 Physics Chapter 15 Short Questions Preparation - Set 2
Question # 1
Does the induced current depend on the resistance of the circuit?
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Ans 1: Yes the induced current depend upon the resistance of the circuit.By ohm's lawI=e/RThus the induced current depends on the resistance of the circuit.
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.
ICS Part 2 Physics Chapter 15 Short Questions Preparation - Set 4
Question # 1
What is back motor effect in generators?
- Ans 1: Back motor effect is the opposing torque produced due to the induced emf in the coil.When coil rotated a current is drawn through the coil.The magnetic field exerts two equal and opposite forces on left and right side of the current carrying coil,These forces are such that they produce a counter torque that oppose the rotational motion of the coil.This effect is known as back motor effect in generators.
