A 10-M Long Straight Wire Is Held in a Horizontal East-West

A 1.0-m long straight wire is held in a horizontal east-west orientation and is then dropped.Supposing that the Earth's magnetic field at this location is 2.0 * 10^-5 T,due north,what will be the induced emf in the wire 2.0 s after it is released? (Hint: The wire is in free-fall,and you can thus calculate its velocity after the 2.0 s.)

A) 3.9 * 10^-4 V
B) 4.0 * 10^-2 V
C) 4.0 * 10^-1 V
D) 2.1 * 10^-1 V
E) 1.2 * 10² V

Correct Answer:

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