Online Preparation of Physics Chapter 15 For 12th Class Fsc

Online Short Questions For Chapter 4 "12th Class Physics Chapter 4 Short Questions Preparation "

Try The Short Questions For 12th Class Physics Chapter 4 Short Questions Preparation

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Physics - 12th Class Physics Chapter 4 Short Questions Preparation

Question # 1

In a transformer there is no transfer of charge from the primary to the secondary.How is then the power transferred?

  • Ans 1: The power will be transferred because the two coils of transformer are magnetically linked i.e, the change of flux through one coil is linked with the other coil.
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Prepare Complete Set Wise Questions For Chapter 4 "12th Class Physics Chapter 4 Short Questions Preparation "

12th Class Physics Chapter 4 Short Questions Preparation - Set 1

Question # 1

In a transformer there is no transfer of charge from the primary to the secondary.How is then the power transferred?

  • Ans 1: The power will be transferred because the two coils of transformer are magnetically linked i.e, the change of flux through one coil is linked with the other coil.
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12th Class Physics Chapter 4 Short Questions Preparation - Set 2

Question # 1

Define motional emf and write its formula.

  • Ans 1: If a conductor moves through a magnetic field then due to change in magnet flux,an emf is induced across the ends of the conductor which is known as motional emf.
    e=vBL sin theta.
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12th Class Physics Chapter 4 Short Questions Preparation - Set 3

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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12th Class Physics Chapter 4 Short Questions Preparation - Set 4

Question # 1

State the Lenz's law and define Henry.

  • Ans 1: Lenz's Law: It states that the direction of induced current is always so as to opposite the change which cause the current.
    Henry: If the current in the primary is changing at the rate of one ampere per second and the emf induced across the ends of the secondary coil is one volt then the mutual inductance is called one henry.
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15th Chapter

12th Class Physics Ch 15 Preparation

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