Answer to Question #1490 in Electricity and Magnetism for Mark

Question

A capacitor has a total charge of 6 µC stored. If it were possible to transfer this charge uniformly through a light with a current of 10 mA, how long would the light stay lit?

Answer 1

From the definition of the electric current, I = Q/t:
t = Q/I = 6x10^-6[C]/(10x10^-3[A]) = 0.6x10^-3 s = 0.6 ms.