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A solenoid of length 20cm and radius 2cm...

A solenoid of length `20cm` and radius `2cm` is closely wound with 200 turns. The magnetic field intensity at either end of the solenoid when the current in the winding is `5 amp`. Is

A

2500 Amp/ m

B

2000 Amp/m

C

1750 Amp/m

D

2940 Amp/m

Text Solution

Verified by Experts

The correct Answer is:
A
`H = (B)/(mu_0) = ("ni")/(2)`
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Knowledge Check

  • A long solenoid has n turns per metre and current IA is flowing through it. The magnetic field induciton at the ends of the solenoid is

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    B
    `mu_0nI//2`
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    `3.14 xx 10^(-3) T`
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    `6.28 xx 10^(-3) T`
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