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

When the primary of a transformer is connected to A.C mains,the current it is very small if the secondary circuit is open.Explain.

  • Ans 1: If the secondary circuit is open then output power will be zero,Because output power is always slightly smaller than the input power,therefore a very small value of current is being drawn by a primary coil of transformer from AC units,
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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

When the primary of a transformer is connected to A.C mains,the current it is very small if the secondary circuit is open.Explain.

  • Ans 1: If the secondary circuit is open then output power will be zero,Because output power is always slightly smaller than the input power,therefore a very small value of current is being drawn by a primary coil of transformer from AC units,
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ICS Part 2 Physics Chapter 15 Short Questions Preparation - Set 2

Question # 1

Define mutual inductance and write at least two factors at which it depends.

  • Ans 1: The ratio of average emf induced in the secondary to the time rate of changing current in the primary is called mutual inductance.
    It depends upon numbers of turn of the coil,area of cross section of the coil closeness of coil and nature of the core materials.
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ICS Part 2 Physics Chapter 15 Short Questions Preparation - Set 3

Question # 1

Can step up transformer increase the power level?

  • Ans 1: No,a step up transformer can not increase the power level,in actual transformer,due of dissipation of energy in the coil the output power is always less than input power,Therefore a step up transformer can't increase power level.
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ICS Part 2 Physics Chapter 15 Short Questions Preparation - Set 4

Question # 1

Can a transformer be used with D.C? Explain

  • Ans 1: No As transformer works on the principle of electromagnetic induction,which is produced by A.C and not by D.C,To induced a voltage in the secondary coil it is necessary to have magnetic flux change.
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ICS Part 2 Physics Chapter 15 Short Questions Preparation

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