Question

Two long straight current-carrying wires run parallel to each other. The current in one of the wires is 7.2A, their separation is 18.1 cm and they repel each other with a force per unit length of 2.6 x104 N/m. Determine the current in the other wire.

Answer 1

3.26 x 10^9 A

Step-by-step explanation:

I1 = 7.2 A, r = 18.1 cm = 0.181 m, F/l = 2.6 x 10^4 N/m

Let teh current in other wire is I2.

Use the formula of force per unit length

`F / l = (\mu _(0))/(4\pi )* (2 I_(1)I_(2))/(r)`

`2.6 * 10^(4) = 10^(-7)(2 * 7.2I_(2))/(0.181)`

I2 = 3.26 x 10^9 A