A wire loop consists of two semicircles connected by straight segments (see figu

Question

A wire loop consists of two semicircles connected by straight segments (see figure below). The inner and outer radii are R1 = 0.4 and R2 = 0.9 m, respectively. A current of I = 1.5 A flows in this loop with the current in the outer semicircle in the clockwise direction.

What is the magnetic moment of this current loop?

( )A m^2

Direction?

A wire loop consists of two semicircles connected by straight segments (see figure below). The inner and outer radii are R1 = 0.4 and R2 = 0.9 m, respectively. A current of I = 1.5 A flows in this loop with the current in the outer semicircle in the clockwise direction.

Explanation / Answer

a)

m = i A = 1.5 * 3.1416/2 * (0.9*0.9 - 0.4*0.4) = 1.53 A m2

b)

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