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A coil is wound on a frame of rectangula...

A coil is wound on a frame of rectangular crosssection. If all the linear dimensions of the frameare increased by a factor 2 and the number ofturns per unit length of the coil remains the same,then the self-inductance of the coil will increaseby a factor o

A

16

B

12

C

4

D

8

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CHETANA PUBLICATION-Electromagnetic Induction-EXERCISE
  1. Which one of the following units denotes the dimensions ML^2//Q^2, whe...

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  2. What is the dimensional formula for the coefficient of self induction?

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  3. A coil is wound on a frame of rectangular crosssection. If all the lin...

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  4. A metal plate is getting heated. It can be because Which is the wrong ...

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  5. In a step up transformer, the input voltage is 300 V and the output vo...

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  6. A step down transformer works on 220 volts a.c. mains. It is used to l...

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  7. A transformer has 250 volts applied to the primary and gives 4.6V in t...

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  8. The number of turns in the primary and secondary coils of a transforme...

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  9. In relation to a transformer, the relation np/ns= 20, indicate that

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  10. In an ideal transformer, the number of turns in the primary is 120 and...

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  11. A transformer is used to reduce the mains supplyof 220V to 22V.If the ...

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  12. The core of a transformer is laminated

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  13. A step down transformer of efficiency 80% is used on a 1000V line to d...

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  14. Henry is equivalent to

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  15. The primary winding of transformer has 200 turns and its secondary win...

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  16. A transformer is used to reduce the main supply of 220 V to11 V. If th...

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  17. The ratio of the turns in the primary and secondary coils of transform...

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  18. A current in one coil changes from 5 A to 3 A in 0.2 sec and the co-ef...

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  19. The current in the coil changes from 3A to 6 A in 3sec. If the induced...

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  20. If south pole of the magnet is moved towards the coil then the nearer ...

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