Suppose the metal rails in the first figure below are now connected on the left

Question

Suppose the metal rails in the first figure below are now connected on the left so that a complete conducting path (through the bar and the rails) is formed as shown in the second figure below. (a) If we wish to find the induced current through the bar, what closed path should we choose for the application of Faraday's law? the closed path formed by the three ends of the rail and the moving metal bar Any closed loop will work. Correct: Your answer is correct. (b) What is the direction of the flux through the path chosen in part (a)? That is, is the flux upward or downward relative to the plane of the rails? upward downward Correct: Your answer is correct. (c) Is the magnitude of the flux increasing or decreasing with time? increasing decreasing Correct: Your answer is correct. (d) What is the direction of the magnetic field produced by the induced current? upward downward Correct: Your answer is correct. (e) If the resistance of the loop is 2,755 , what are the magnitude and the direction of the current through the bar? (Assume B = 2.3 T, L = 1.6 m, and v = 0.57 m/s.) magnitude mA direction clockwise Correct: Your answer is correct.

Explanation / Answer

B=2.3 T

L = 1.6 m

v = 0.57 m/s

So, Emf, E = BLv

So, Current, I = E/R = BLv/R = 2.3*1.6*0.57/(2755)

= 7.6*10^-4 A

= 0.76 mA <--------answer(magnitude)

dircetion = clockwise

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