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In using Ampere's law, to find the magne...

In using Ampere's law, to find the magnetic field inside a straight long solenoid the loop that is taken is

A

A circular loop in a with the soleniod

B

a rectangular loop in a plane is perpendicular to the axis of the solenoid

C

A rectangulr loop in a plane containing the axis of the solenoid the loop being totally within the soleniod

D

A rectangular loop in a plane containing the axis of the soleniod the loop being partly inside and partly outside it

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The correct Answer is:
D
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