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To induce an e.m.f. in the coil...

To induce an e.m.f. in the coil

A

high temperature is required

B

string winding is required

C

constant electromagnetic field only is chosen

D

varying electromagnetic field is required

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To induce an e.m.f. in a coil, the magnetic flux

Define self induction and derive formula for self induced e.m.f. in the coil due to self induction.

Define mutual inductance. Derive formula for the induced e.m.f. in the coil due to mutual inductance.

The current in the coil changes from 3A to 6 A in 3sec. If the induced e.m.f. in the coil is 60 V, then self inductance of the coil is

Find the change in magnetic flux associated with the coil in 15 seconds, if the induced e.m.f. in the coil is 2 xx 10^-3V .

A coil of 100 turns each of area 0.12m^2 is rotated with constant speed 62.8rad/s in uniform magnetic field of induction 0.02 tesla about an axis in the plane of coil and perpendicular to the direction of field. Calculate maximum value of induced e.m..f.in the coil.

A coil of 10^3 turns each of area 100 cm^2 rotateswith speed of 100 r.p.m. about an axis in its plane and perpendicular to uniform field of induction 36 xx 10^-2 Wb//m^2 . Find the peak and e.m.f. value of the induced e.m.f. in the coil.

The mutual inductance of a pair of coils is 0.75H. If the current in the primary coil changes from 0.5A to zero in 0.01s, find the average induced e.m.f. in the secondary.

A straight conductor of length 0.4 m is moving with a velocity of 7m//s , in a magnetic field of induction 2 Wb//m^2 . The value of the maximum induced e.m.f. in the conductor is

A current through a coil of self inductance 10 mH increases from 0 to 1 A in 0.1 s. What is the induced emf in the coil?

CHETANA PUBLICATION-ELECTROMAGNETIC WAVES AND COMMUNICATON SYSTEM-EXERCISE
  1. The natural source of Ultraviolet rays is

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  2. Radio waves and visible light in vacuum have

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  3. To induce an e.m.f. in the coil

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  4. Which of the following waves are not electromagnetic waves?

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  5. Electromagnetic waves were first produced in the laboratory by

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  6. The.....% of the solar radians are infrared in nature.

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  7. Ultraviolet rays can NOT pass through

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  8. The air in the stratosphere contains

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  9. Which of the following statements is NOT CORRECT?

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  10. The radio waves reflected from.......are called space wave.

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  11. The special infrared photograph of the body to see diseased parts is c...

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  12. In the diagnosis of superficial tumours and varicose veins which of th...

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  13. The sound waves after being converted into electrical waves are not tr...

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  14. Choose the correct options. Earth's atmosphere is rechest in

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  15. Choose the correct options. A device that converts one form of energ...

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  16. Choose the correct options. Ultraviolet rays can NOT pass through ...

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  17. Choose the correct options. The radio waves from..... are called spa...

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  18. What is modulation?

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  19. Name the most harmful radiation entering the earth's atmosphere from t...

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  20. Does an ordinary electric lamp emit EM waves?

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