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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
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 1
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 2
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.
ICS Part 2 Physics Chapter 15 Short Questions Preparation - Set 3
Question # 1
What happen to the current of a circuit if a load resistance of the circuit is much less than the power transferred?
- Ans 1: The greater the load the larger the current is supplied by the generator,When the load resistance of the circuit is much less,small current is supplied by the generator.
ICS Part 2 Physics Chapter 15 Short Questions Preparation - Set 4
Question # 1
What is meant by back emf?Write its SI units.
- Ans 1: The emf induced across the ends of a coil due to the changing current in the same coil is called self induced emf or back emf.Its SI unit is Volt(V).
