) Timer Notes à Evaluate-Feedback-Print A very long, straight wire carries a cur

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) Timer Notes à Evaluate-Feedback-Print A very long, straight wire carries a current of 15.5 A out of the screen. An electron outside the wire is 1.67 cm to the right of the central axis of the wire and is moving with a speed of 5.91×106 m/ magnetic force on the electron if it is moving directly away from the wire (i.e., rightward). Course Contents » » Homework 08 Info s. Find the magnitude of the Submit Answer Tries 0/5 Find the magnitude of the force on the electron if it is moving parallel to the wire in the direction of the current (i.e., out of the screen). Submit Answer Tries 0/5 Find the magnitude of the force on the electron if it is moving upward. Submit Answer Tries 0/5 Send Feedback Post Discussion

Explanation / Answer

field due to wire,

B = u0 I / (2 pi r)

B = (4pi x 10^-7)(15.5) / (2 x pi x 0.0167)

B = 1.856 x 10^-4 N upward

Fb =q (v x B) = q v B sin(90)

Fb = 1.6 x 10^-19 x 5.91 x 10^6 x 1.856 x 10^-4 x sin90

Fb = 1.755 x 10^-16 N ......Ans

now theta = 90 deg

Fb = 1.755 x 10^-16 N ....Ans

theta = 0 so sin0 = 0

Fb = 0 ....Ans

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