I'm having a bit difficulty in understanding this question... In a Hydrogen aton, an electron goes round the proton at a rate of 7 x 10^5 rev/s in a circular orbit of radius 5.0 x 10^-11 What is the current produced by the revolution of electron? Well, the formula for current is Q/t and Ne/t. I don't know how to convert the angular velocity to current. Please help!