A 1 kg horizontal aluminum bar, 2.0 m long, is free to slide up and down between two tall, vertical metal rods that are 2.0 m apart (d=2m). A 2.0 T magnetic field is directed perpendicular to the plane of the rods as indicated. The bar is raised to near the top of the rods (Position 1), and a 16.0 2 resistor is connected across the two rods at the top. Then the bar is dropped. Assume the bar always remains horizontal and in contact with the rods. 1) What is the terminal speed at which the bar falls? A) 9.8m/s B) 19.6 m/s C) 39.2 m/s D) 0 m/s E= V= (IB) 9.8.16 = 9.8m/s (2) La)) X X Λ A X Position 1 X X X X X X X X X X X X Position 2 Position 3 d 2) What is the magnitude of the magnetic force acting on the aluminum bar at Position 3? A) 9.8N B) 19.6 N C) 39.2 N mag D) 0 N (there is no magnetic force acting on the Al bar, because this is not a magnetic material) 3) What is the power dissipated by the resistor? A)384W B)1536W C) OW D) 96W 4) What is true? A) The speed of the bar at Position 2 is equal with the speed of the bar at Position 3 B) The speed of the bar at Position 1 is equal with the speed of the bar at Position 3 C) The speed of the bar at Position 3 is greater than the speed of the bar at Position 2 1

A 1 kg horizontal aluminum bar, 2.0 m long, is free to slide up and down between two tall, vertical metal rods that are 2.0 m apart (d=2m). A 2.0 T magnetic field is directed perpendicular to the plane of the rods as indicated. The bar is raised to near the top of the rods (Position 1), and a 16.0 2 resistor is connected across the two rods at the top. Then the bar is dropped. Assume the bar always remains horizontal and in contact with the rods. 1) What is the terminal speed at which the bar falls? A) 9.8m/s B) 19.6 m/s C) 39.2 m/s D) 0 m/s E= V= (IB) 9.8.16 = 9.8m/s (2) La)) X X Λ A X Position 1 X X X X X X X X X X X X Position 2 Position 3 d 2) What is the magnitude of the magnetic force acting on the aluminum bar at Position 3? A) 9.8N B) 19.6 N C) 39.2 N mag D) 0 N (there is no magnetic force acting on the Al bar, because this is not a magnetic material) 3) What is the power dissipated by the resistor? A)384W B)1536W C) OW D) 96W 4) What is true? A) The speed of the bar at Position 2 is equal with the speed of the bar at Position 3 B) The speed of the bar at Position 1 is equal with the speed of the bar at Position 3 C) The speed of the bar at Position 3 is greater than the speed of the bar at Position 2 1

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter32: Faraday’s Law Of Induction

Section: Chapter Questions

Problem 71PQ: Two frictionless conducting rails separated by l = 55.0 cm are connected through a 2.00- resistor,...

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