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A Thin Copper Rod 1 B⃗\vec { B } Field of 0

Question 46

Multiple Choice

A thin copper rod 1.0 m long has a mass of 0.050 kg and is in a B⃗\vec { B } field of 0.10 T.What minimum current in the rod is needed in order for the magnetic force to balance the force exerted on the rod by Earth?


A) 1.2 A
B) 2.5 A
C) 4.9 A
D) 9.8 A

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