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In the relation phi = BA cos theta, thet...

In the relation `phi = BA cos theta, theta` is angle

A

which normal to surface area makes with the direction of magnetic field

B

which magnetic field makes with the surface

C

which is never constant

D

none of the above

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The correct Answer is:
A
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PRADEEP-ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENT-Exercise
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  2. SI unit of magnetic flux is

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  4. Choose the wrong statement :

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  7. Out of the following choose the correct relation

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

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

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

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

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

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

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

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

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

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

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

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

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

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