Questions

Two straight segments of wire ab and bc each carrying current i, are placed as shown in figure. The cube edge is 50 cm and magnetic field is uniform along Y-axis having magnitude 0.4 T. If i = 3 A, the force experienced by wire abc in the presence of magnetic field is

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0.6i^

1.2(i^+k^)

0.6(2i^+j^-2k^)

0.6(2i^-k^)

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detailed solution

Correct option is A

Wire abc can be replaced by a straight wire ac for the computation of force.Length of ac→ can be written as,l→=r→C-r→A=[(i^+j^)-(i^+k^)]50×10-2=0.50[j^-k^] Required force, F→=I(l→×B→)=0.6i^

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