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A circular coil of radius 2.00cm has 50 ...

A circular coil of radius `2.00cm` has `50` turns. A uniform magnetic field `B=0.2T` exists in the space in a direction parallel to the axis of rthe loop. The coil is now rotated about a diameter through an angle of `60^(@)` . The operation takes `0.Is` . The average emf induced in the coil is

A

`6.28xx10^(-2)V`

B

`6.28xx10^(-3)V`

C

`62.8xx10^(-2)V`

D

`628xx10^(-2)V`

Text Solution

Verified by Experts

The correct Answer is:
A
`phi_(1)=NBAcos0=NBA`
`phi_(2)=NBAcos60^(@)=(NBA)/(2)`
`|bar(e)|=(Deltaphi)/(Deltat)=(NBA//2)/(Deltat)`
`=(50xx0.2xxpixx4xx10^(-4))/(2xx0.1)`
`=6.28xx10^(-2)V`
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CP SINGH-ELECTROMAGNETIC INDUCTION-EXERCISES
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  2. A uniform magnetic field B exists in a cylindrical region of radius I0...

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  3. A circular coil of radius 2.00cm has 50 turns. A uniform magnetic fiel...

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  4. A circular coil of one turn of radius 5.0cm is rotated about a diamete...

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  5. A magnet is brought towards a coil (i) speedily (ii) slowly then the i...

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  9. A magnetic field of 2xx10^(-2)T acts at right angles to a coil of area...

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  10. Faraday's law are consequence of conservation

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  15. An induced emf is produced when a magnet is plunged into a coil. The m...

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  16. In the figure the flux through the loop perpendicular to the plane of ...

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  17. A metallic meter stick moves with a velocity of 2m//sec in a diretion ...

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