Problem 20.27 Part A Determine the magnitude and direction of the force between

ID: 1434822 • Letter: P

Question

Problem 20.27

Part A

Determine the magnitude and direction of the force between two parallel wires 30 m long and 7.0 cm apart, each carrying30 A in the same direction.

(Correct)

Part B

Determine the magnitude of the force between two parallel wires.

Express your answer to two significant figures and include the appropriate units.

(4 Answers that were wrong: 0.6 N, 8.1 x10^-4N, 7.71 x10^-4 N, 1.7N)

The force on each wire will be repulsive. The force on each wire will be attractive. The wires will not interact.

F= 2x10^-7 xI^2 x L / d
= 2x10^-7 x 30^2x 30 / (7 x 10^-2)
=0.077 N

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