1.

Two parallel wires 1 m apart carry currents of 1 A and 3 A respectively in opposite directions. The force per unit length acting between these two wires is

Answer»

`6 xx 10^(-5) NM^(-1)` attractive
`6 xx 10^(-5)Nm^(-1)` repulsive
`6 xx 10^(-7)Nm^(-1)` attractive
`6 xx 10^(-7) Nm^(-1)` repulsive

Solution :`F= (mu_(0)I_(1)I_(2))/(2PI d)`
`F= (2 xx 10^(-7) xx 1 xx 3)/(1) = 6 xx 10^(-7) Nm^(-1)`


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