** 12. A flexible copper cable forms a conducting loop in the presence of a magnetic field of strength 5.0 x 10-3 T into the page, as shown at left. The ends of the wire pass through a narrow rubber ring and are finally attached to a 10-2 resistor. The resistor is then pulled downward, pulling the wire through the ring and reducing the size of the loop. Assume that the resistor is carefully pulled at a speed so that the area of the loop diminishes at a rate of 0.10 m²/s. a) What emf is induced in the wire? b) In which direction, clockwise or counterclockwise, will the induced current start to flow in the wire loop? ww Pull c) Assuming the resistance of the copper cable is negligible, what is the current through the resistor?

** 12. A flexible copper cable forms a conducting loop in the presence of a magnetic field of strength 5.0 x 10-3 T into the page, as shown at left. The ends of the wire pass through a narrow rubber ring and are finally attached to a 10-2 resistor. The resistor is then pulled downward, pulling the wire through the ring and reducing the size of the loop. Assume that the resistor is carefully pulled at a speed so that the area of the loop diminishes at a rate of 0.10 m²/s. a) What emf is induced in the wire? b) In which direction, clockwise or counterclockwise, will the induced current start to flow in the wire loop? ww Pull c) Assuming the resistance of the copper cable is negligible, what is the current through the resistor?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Bar Magnet

In physics, magnetism is a phenomenon exhibited by a magnetic substance that exerts either attractive or repulsive force. A bar magnet is either a rectangular or round and hollow fit comprised of ferromagnetic materials and has a fanciful attractive field surrounded by it.

Question

** 12. A flexible copper cable forms a conducting loop in the presence of a magnetic field of
strength 5.0 x 10-3 T into the page, as shown at left. The ends of the wire pass through a narrow
rubber ring and are finally attached to a 10-2 resistor. The resistor is then pulled downward,
pulling the wire through the ring and reducing the size of the loop. Assume that the resistor is
carefully pulled at a speed so that the area of the loop diminishes at a rate of 0.10 m²/s.
a) What emf is induced in the wire?
b) In which direction, clockwise or counterclockwise, will the induced current start to
flow in the wire loop?
ww
Pull
c) Assuming the resistance of the copper cable is negligible, what is the current through
the resistor?

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