Question

Consider two long, straight parallel wires separated by 1.00 m. In the figure below, the current through wire one is 1.00 A and is directed out of the page. The direction and magnitude of the current through wire two is unknown. Wire two is observed to be attracted toward wire one with a force per unit length of 2.00×10^-7 N/m.

what is the current through wire two?

Wire One Wire Two 1.00 m

A) 1.00 A

B) 1.50 A

C) 2.00 A

D) 2.50 A

E) 3.00 A

Answer 1

when two current carrying wires have current flowing in same direction , they attract each other

with force per unit length between wires =

d is the distance between wires

so current in other wire is 1 A

as

/40 = 4π × 10-

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