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TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A

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TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A

12th Standard English Medium Physics Subject Electromagnetic Induction and Alternating Current Book Back 2 Mark Questions with Solution Part - II updated Book back Questions

Published on: 13/05/2022

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Std: 12th Standard - Physics

chapter: - Book back Questions

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Questions:

Generic 2

5 x 2 = 10

What is meant by mutual induction?

What for an inductor is used? Give some examples.

How is Eddy current produced? How do they flow in a conductor?

State Lenz’s law.

What is meant by electromagnetic induction?

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Answers Key:

Generic 2

5 x 2 = 10

When an electric current passing through a coil changes with time, an emf is induced in the neighboring coil. This phenomenon is known as mutual induction.

Inductor is a device used to store energy in a magnetic field, when an electric current flows through it. Examples: coils, solenoids and toroids

Even for a conductor in the form of a sheet or plate, an emf is induced when magnetic flux linked with it changes. But the difference is that there is no definite loop or path for induced current to flow away. As a result, the induced currents flow in concentric circular paths. As these electric currents resemble eddies of water, these are known as Eddy currents. They are also called Foucault currents.

Lenz’s law states that the direction of the induced current is such that it always opposes the cause responsible for its production.

Whenever the magnetic flux linked with a closed coil changes, an emf is induced and hence an electric current flows in the circuit. This current is called an induced current and the emf giving rise to such current is called an induced emf. This phenomenon is known as electromagnetic induction.