a) What is the induced current in the resistor? Answer in units ofA. b) What is

Question

a) What is the induced current in the resistor? Answer in units ofA. b) What is the magnitude of the horizontal force F required to keepthe axle rolling at constant speed? Answer in units of N. c) Which end of the resistor (a or b) is at the highest potentialwhile the axle is still to the right of the resistor? d) After the axle rolls past the resistor, does the current throughR reverse direction? e) Find the mechanical power pmech. (Hint: pmech =Fv) Answer in units of W. f) Find the dissipative power Pdissip inthe resistor. (Hint: Pdissip=I2R)Answer in units of W.

Explanation / Answer

given L = 0.828m v = 0.743m/s R = 14.6 B = 2.54T induced current in the resistor = i = /R = BLv/R =    plug in values i = ------A power plug in values p = -----W mechanical power pmech = Fv but F = BiL plug in values = pmech =------W pdisspative = i2R plug in values ------- applied force F = Bil plug in values   F = -------N excess of positive charge at upper end so at pointa has highest potential.

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