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A current I ampere flows along an infini...

A current I ampere flows along an infinitey1 along straight thin walled tube, then the magnetic induction at any point inside the tube is .

A

infinite

B

zero

C

`(mu_(0))/(4pi).(2i)/(r)tesla`

D

`(2i)/ r tesla`

Text Solution

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The correct Answer is:
2
Let `R` be radius of a along thin cylindrical shell To calculate the magnetic induction at a distance `r(rltR)` from the axis of cylinder a circular loop of radius r is shown Since, no current is enclosed in the circle so, from Ampere's point of circle. Hence the magnetic induction at may point inside the infinitely long stright thin walled tube (cylindrical) is zero .
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