Questions
In the diagram shown, a wire carries current I. The loop has N turns and part of helical loop on which arrows are drawn is outside the plane of paper. What is the value of the ( as in Ampere's law) on the helical loop shown in the figure?
detailed solution
Correct option is C
Here B→ (due to I) and dl→ will be in same direction.So, ∮B→. dl→ = ∮B dl cos 00∮B dl = ∮B dl=B N 2πr =NB2πr=Nμ0ITalk 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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