Homework Help: Physics 2

Posted by June on Saturday, June 11, 2011 at 2:44am.

Suppose, in the figure below, a 0.90-m rod experiences a 1.2-T magnetic field and the hand keeps it moving to the right at a constant speed of 3.5 m/s. If the current in the circuit is 0.040 A, what is the average power being delivered to the circuit by the hand?

Physics 2 - drwls, Saturday, June 11, 2011 at 3:43am
There is no "figure below".

Average power is the force on the bar multiplied by the velocity.

The force on the bar is B*I*L
L = 0.90 m
B = 1.2 Tesla
I = 0.040 A

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