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A long solenoid is formed by winding 20 ...

A long solenoid is formed by winding 20 turns `cm^-1`. What current is necessary to produce a magnetic field of 20 mT inside the solenoid?

A

`8.0A`

B

`4.0A`

C

`2.0A`

D

`1.0A`

Text Solution

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The correct Answer is:
A
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