- 12 As Shown Below Two Smooth Conducting Rails A Distance L 2 00 M Apart Make An Angle Of 22 5 With The Horizontal 1 (305.68 KiB) Viewed 46 times
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12. As shown below, two smooth conducting rails a distance L = 2.00 [m] apart make an angle of 22.5° with the horizontal. A bar of mass 2.00-kg(rests across the rails, as shown in below. There is a uniform magnetic field vertically upward equal to 0.500 N-s/C-m. A power supply is connected to cause a current I to flow through the bar. Starting from zero volts, the output voltage of the power supply is increased until a value is found where the bar remains motionless on the rails, neither sliding down nor moving up the rails. If the output voltage is now doubled and assuming no friction, how will this affect motion of the bar? [5] Bar ILB L-2.0 Fig. 3 A Doubling the output voltage will have no effect on the bar's motion. B. The bar will begin to accelerate down the slope of the rails. CThe bar will begin to accelerate up the slope of the rails. D. The bar will slide down the rails at constant velocity. The bar will slide up the rails at constant velocity. xa