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February 27, 2015

Homework Help: physics

Posted by Ulises on Tuesday, April 9, 2013 at 4:38pm.

A square loop (side L) spins with angular frequency ω in field of strength B. It is hooked to a load R.

Write an expression for current I(t) in terms of B,L,R,ω and t (enter omega for ω).

(b) How much work is done by the generator per revolution? Express your answer in terms of B,L,R and ω (enter omega for ω).

(c) To make it twice as hard to turn (twice as much work), what factor would you have to multiply the resistance R?
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