Q.

A B C is a current carrying conductor carrying a current i = 2A. If length of the segment Ab is 33m, then what should be the length of BC . So that net force on the conductor ABC becomes zero?

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a

6 m

b

4 m

c

53 m

d

43 m

answer is A.

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Detailed Solution

F→=i le→×B→Where le = Ac = equivalent length. It is evident that F→ is zero when le→ and B→ are parallel (as shown in the figure).∴BC=AB/cos300=3332 m =6 m
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