Questions
A very long cylindrical conductor carries a current I. ‘p’ is point lying outside the conductor at a distance x from the surface of the conductor and magnetic induction at P is ‘B’. Then which of the following graphs correctly shows the variation of B with x?
detailed solution
Correct option is C
B=μ0I2π(R+x) where R = Radius of conductor.At x=0, B=μ0I2πR and as x→∞,B→0Talk to our academic expert!
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A coaxial cable consists of a thin inner conductor fixed along the axis of a hollow outer conductor. The two conductors carry equal currents in opposite directions. Let B1 and B2 be the magnetic fields in the region between the conductors, and outside the conductor, respectively. Then
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