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When number of turns of a solenoid is do...

When number of turns of a solenoid is doulbed, its self inductance becomes k time, where k =

A

2

B

1

C

8

D

4

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The correct Answer is:
D
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PRADEEP-ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENT-Exercise
  1. In which of the following devices, the eddy current effect is not used...

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  2. Out of the following choose the correct relation

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  3. When number of turns of a solenoid is doulbed, its self inductance bec...

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  4. The magnetic flux linked with a coil is phi = (3 t^(2) - 2 t + 1) mill...

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  5. A wire of length 2 m moves with a speed of 5 m//s perdendicular to a m...

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  6. One weber is the amount of ……………………over an area of ……………………….. Held no...

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  7. An e.m.f. is induced in a coil when ……………………. Linked with the coil ………...

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  8. The magnetic of ………………..in a circuit is …………..to the……………………linked wit...

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  9. According to …………………law, the polarity of ………………………is such that it……………...

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  10. Lenz's law is consequence of the law of conservation of

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  11. Eddy curents are the current …………………….when …………………….changes.

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  12. If omega is angular frequency of a.c., then the reactance offered by i...

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  13. Self induction of a coil is said to be…………….. When a current change………...

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  14. Self inductance of a solenoid varies……………………as the ………………of the number...

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  15. Coefficient of mutual inductance of two coil is numerically …………………lin...

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  16. A coil with an average diameter of 0.02 m is placed perpendicular to a...

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  17. An air cored solenoid of length 50 cm and area of cross section 20 m^(...

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  18. A magnetic field of flux density 1.0 Wb m^(-2) acts normal to a 80 tur...

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  19. A square copper coil of each side 8 cm consists of 100 turns. The coil...

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  20. The area of a coil of 25 turns is 1.6 cm^(2). This coil is inserted in...

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