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A solenoid has radius r and length l car...

A solenoid has radius r and length l carries a current I. If the number of its turns is 200, the energy stored in the solenoid is …..

A

`(N^2A^2I)/(2pir)`

B

`(N^2AI^2)/(mu_0r)`

C

`(mu_0N^2AI^2)/(2l)`

D

0

Text Solution

Verified by Experts

The correct Answer is:
C
`U=1/2 LI^2` putting `L=(mu_0N^2A)/l`
`therefore U=1/2 (mu_0N^2A I^2)/l`
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KUMAR PRAKASHAN-ELECTROMAGNETIC INDUCTION-Section D MCQs (From DARPAN Based on Textbook )
  1. A coil of resistance 20Omega and self-inductance 5 H connected with b...

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  2. The unit of inductance is equivalent to …..

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  3. A solenoid has radius r and length l carries a current I. If the numbe...

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  4. Current I is following through a toroidal solenoid of radius r, length...

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  5. If N is the number of turns in a coil, the value of self inductance va...

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  6. If number of turns in a coil is increased from 10 to 100, its inductan...

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  7. Two inductors each of self-inductance L is connected in parallel. If t...

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  8. Mutual inductance of system of two coils is 0.3 H. If the current in t...

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  9. The flux linked with each turn of coil is 0.1 Wb and total number of t...

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  10. As shown in the figure, the planes of two concentric coils are mutuall...

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

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

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

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  14. Mutual inductance of two coils can be increased by

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  15. Self inductance of straight conducting wire is

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

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

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

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

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

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