1.

Two parallel very long straight wires carrying current of 5A each are kept at a separation of 1 m. If the currents are in the same direction, the force per unit length between them is ______ N/m. (mu_(0)=4pixx10^(-7)SI)

Answer»

`5xx10^(-5)`, ATTRACTIVE
`5xx10^(-6)`, attractive
`5xx10^(-5)`, REPULSIVE
`5xx10^(-6)`, repulsive

Solution :`F=mu_(0)/(2pi)XX(I_(1)I_(1))/y`
= `2XX10^(-7)xx(5xx5)/1`
= `5xx10^(-6)N/m`, attractive


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