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X and Y coils are joined in a circuit in such a way that when the change of current in X in 2A, the change in the magnetic flux in Y is 0.4 Wb. The mutual induction of the system of two coils is …... . H.

A

0.8

B

0.4

C

0.2

D

5

Text Solution

Verified by Experts

The correct Answer is:
C
`phi_y=MI_x`
`therefore 0.4=Mxx2`
`therefore` M=0.2 H
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KUMAR PRAKASHAN-ELECTROMAGNETIC INDUCTION-Section D MCQs (From DARPAN Based on Textbook )
  1. As shown in the figure, the planes of two concentric coils are mutuall...

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  2. Two circular coils can be arranged in any of the three situations as s...

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  3. X and Y coils are joined in a circuit in such a way that when the chan...

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  4. A circular coil of radius 5 cm has 500 turns of a wire. The approximat...

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  5. Mutual inductance of two coils can be increased by

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  6. Self inductance of straight conducting wire is

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  7. When current is increasing in the coil, the direction of induced emf i...

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  8. The self-inductance of a coil increases when the coil is wound on a so...

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  9. The frequency of A.C. mains in India is ….. Hz.

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  10. Energy stored in the choke coil is in the form of

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  11. The self-inductance of two solenoids A and B having equal length are s...

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  12. One electric generator produces power at 220 V potential difference. I...

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  13. In one A.C. generator, brushes connected with slip rings become positi...

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  14. Working principle of electric motor is to convert …...

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  15. Voltage obtained in one A.C. generator V=V0 cos omegat . If V0 = 10 vo...

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  16. A circular coil with radius 10 cm and 10 no. of tightly wound identica...

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  17. A generator produces a voltage that is given by V = 240 sin 120t, wher...

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  18. If an A.C. current of frequency 50 Hz is flowing through a conducting ...

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  19. A coil having N turns and area A is rotating in uniform magnetic field...

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  20. In an AC generator, the brushes in contact with the step rings alterna...

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