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Two straight wires A and B of lengths 10...

Two straight wires A and B of lengths `10m` and `16m` and carrying currents `4*0A` and `5*0A` respectively in opposite directiions, lie parallel to each other `4*0cm` apart, Comute the force on a `10cm` long section of the wire B near its centre.

Text Solution

Verified by Experts

The magnitude of repulsive force per unit length on each wire is
`F/l=(mu_0)/(4pi)(2I_1I_2)/(r)=10^-7xx(2xx4*0xx5*0)/((4xx10^-2))=10^-4Nm^-1`
`:.` Force on a `10cm` length of the wire `B=10^-4xx0*1=10^-5N`
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