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Two coaxil solenoids 1 and 2 of the same...

Two coaxil solenoids 1 and 2 of the same length are set so that one is inside the other. The number of turns per unit length are `n_(1)` and `n_(2)`. The current `i_(1)` and `i_(2)` are flowing in opposite directions. The magnetic field inside the inner coil is zero. This is possible when

A

`i_(1)nei_(2)andn_(1)=n_(2)`

B

`i_(1)=i_(2)andn_(1)=n_(2)`

C

`i_(1)=i_(2)andn_(1)nen_(2)`

D

`i_(1)n_(1)=i_(2)n_(2)`

Text Solution

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The correct Answer is:
B, D
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