Apacked bundle of 75 long, straight, insulated wires forms a cylinder of radius r = 0.420 cm. if each wire carries 1.50 a, (a) what is the magnitude of the magnetic force per unit length acting on a wire located 0.220 cm from the center of the bundle?

Explanation:

We are given that

Number of wires= N=75

Radius of cylinder=0.420 cm

Current in each wire=1.5 A

We have to find the magnitude of the magnetic force per unit length acting on  a wire located at 0.22 cm from the center of the bundle.

r=0.22 cm

Force acting on a wire is given by  

Force=F=IBL

Substitute the values in the given formula we get

Hence, force per unit length acting on a wire located 0.22 cm from the center of the bundle=

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c) both a and b.