Question

Problem 6. A conducting rod of mass 50 grams slides without friction on a pair of conducting horizontal rails spaced 0.750 m apart. A steady current of 85.0 A exists in the rails and bar as shown. The rails and bar are in a uniform 1.35 T magnetic field directed as shown. (a) What is the magnitude and direction of the acceleration of the rod? (b) If the rod starts from rest and reaches a speed of 150 m/s when it leaves the rails, how long are the rails from where the rod starts? (c) If the direction of the current is reversed, how would your answers to part (a) change? (d) If the field were in the plane of the rails and pointing from the bottom of the page to the top of the page, would the rod accelerate? Justify your answer.

Answer 1

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