An electron in a television tube moves with a speed of 6.50 107 m/s, in a direction perpendicular to the Earth's field, which has a strength of 5.00 10-5 T. (a) What strength electric field must be applied perpendicular to the Earth's field to make the electron move in a straight line

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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c) up is the direction the magnetic force is acting on the charge.

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