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Magnetic Field due to a Current Show that two straight wires running parallel to each other,...

Magnetic Field due to a Current

Show that two straight wires running parallel to each other, each carrying the same current I, exert forces on each other.

(a) Draw a diagram showing how this force arises

(b) Find the force, and distinguish the two cases (i) currents parallel, and (ii) currents antiparallel.

(c) What is the force per unit length if I = 1 A, and the wires are 1 cm apart?
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