A long, straight horizontal wire carries a current of 2.60 A directed toward the

Question

A long, straight horizontal wire carries a current of 2.60 A directed toward the right. An electron is traveling in the vicinity of this wire.

a) At the instant the electron is 4.85 cm above the wire and moving with a speed of 5.70 x 10^4 m/s directly toward it, what is the direction of the force that the magnetic field of the current exerts on the electron?
b) What is the magnitude of the force in part A?
c) What would be the direction of the magnetic force if the electron were instead moving parallel to the wire in the same direction as the current?
d) What would be the magnitude of the magnetic force if the electron were instead moving parallel to the wire in the same direction as the current?

Explanation / Answer

a)The force is towards right...by Right Hand Screw Rule
b)F = qv B = 1.6 * 10-19 * 5 * 104 * (0i/2d) = 8.577 * 10-20 N

c)in upward direction.

d)F = qv B = 1.6 * 10-19 * 5 * 104 * (0i/2d) = 8.577 * 10-20 N

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