There is an electric current in a wire of mass per unit length 40 g m 1
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There is an electric current in a wire of mass per unit length 40 g m−1. The wire is placed in a magnetic field of strength 0.50 T and the current is gradually increased until the wire just lifts off the ground.
What is the value of the current when this happens?
A. 0.080 A
B. 0.20 A
C. 0.78 A
D. 780 A
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Related Book For
Cambridge International AS And A Level Physics Coursebook
ISBN: 9781108859035
3rd Edition
Authors: David Sang, Graham Jones, Gurinder Chadha, Richard Woodside
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