Q.

Two long wires carrying current I1 and I2 are arranged as shown in figure. The one carrying current I1 is along is the x-axis. The other carrying current I2 is along a line parallel to the y–axis given by x = 0 and z= d. The force exerted at O2 because of the wire along the x-axis is

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a

zero

b

μ0I1I24πd

c

μ0I1I22πd

d

2μ0I1I2πd

answer is D.

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Detailed Solution

F¯=i(l¯×B¯)=i(l(j^)×B(j^))=0 

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