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?

# A B C is a current carrying conductor carrying a current i = 2A. If length of the segment AB is $3\sqrt{3}$m, then what should be the length of BC, so that net force on the conductor ABC becomes zero?

1. A

2. B

3. C

4. D

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Where le = Ac = equivalent length. It is evident that $\stackrel{\to }{\mathrm{F}}$ is zero when $\stackrel{\to }{{l}_{e}}$ and $\stackrel{\to }{\mathrm{B}}$ are parallel (as shown in the figure).