Consider the physical system shown in the figure (Figure 1) , which consists of

Question

Consider the physical system shown in the figure (Figure 1) , which consists of two current-carrying wires each with a length of 75 cm .

Part A

If the net magnetic field at the point A is out of the page, is the force between the wires attractive or repulsive?

Part C

Calculate the magnitude of the force exerted by each wire on the other wire, given that the magnetic field at point A is out of the page with a magnitude of 2.2×10?6 T .

Express your answer using two significant figures.

Explanation / Answer

1 ) repulsive

2 ) B = 4pi *10^ -7 * I* /( 2pi *0.11 ) -  4pi *10^ -7 * 3.7 * /( 2pi *0.33) = 2.2*10^-6

solve for I

i gor I = 2.4433 A

force netween woire

F = 4pi * 10^-7 * 2.24433 *3.7 * 0.75 / ( 2pi * 0.22 = 5.66 *10^-6 = 5.66 micro Tesla

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