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A circular coil of radius 25cm, carries ...

A circular coil of radius `25cm`, carries a current of 50 ampere. If it has 35 turns, the flux density at the centre of the coil is `( i n Wb//m^(2))`

A

`pi xx 10^(-3)`

B

`1.4 pi xx 10^(-3)`

C

`14 pi xx 10^(-3)`

D

`2pi xx 10^(-3)`

Text Solution

Verified by Experts

The correct Answer is:
B
`B = (mu_0"ni")/(2r)`
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NARAYNA-MOVING CHARGES AND MAGNETISM-EXERCISE - 1(C.W) (AMPERE.S CIRCUITAL LAW BIOT-SAVART LAW AND ITS APPLICATIONS)
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  8. A circular coil of radius 25cm, carries a current of 50 ampere. If it ...

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  12. A wire carrying a current of 4A is in the form of the circle. It is ne...

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  13. Two concentric circular coils A and B have radii 25cm and 15cm and ca...

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  14. A wire carrying a current of 140 ampere is bent into the form of a cir...

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  15. The magnetic induction at a point at a large distance d on the axial l...

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  16. A particle having charge 100 times that of an electron is revolving in...

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