Questions
A long, straight, hollow conductor tube carrying a current has two sections A and C of unequal cross section joined by a conical section B. 1, 2 and 3 are the points on a line parallel to the axis of the conductor. The magnetic fields at 1, 2 and 3 have magnitude B1, B2 and B3 :
detailed solution
Correct option is A
Current not depends on area of cross section of wire So IA=IB=IC=I and B∝I. Hence, B1=B2=B3Talk to our academic expert!
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Four long insulated current carrying wires, cross each other as shown in the figure. If the separation between any pair of parallel wires is d, the magnetic induction at O is
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