When moving a charge of 50 cells along a conductor with a resistance of 10 ohms, a work of 200J was performed. Determine current flow time and power.
I = q / t (q-charge, t-time).
Current = I ^ 2 * R * t = (q ^ 2 * R) / t = (2500 * 10) / t
200 = 25000 / t Hence, t = 125s.
P (power) = U * I = I ^ 2 * R = (q ^ 2 * R) /t^2=1.6W
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