Recent content by jdefrancesco

Homework Statement In a Summer's day, there's no wind, and start to rain. So the drops fall vertically for an observer on the ground. A car has a velocity of 10 Km/h and the driver see that the drops are coming perpendicularly to the windshield. If 60° is the angle between the windshield and...

Thanks a lot! :biggrin:

:-p So in the inner surface will be charge but the net charge will be zero because: And this opposite charge induced is the reason of the shock in the option b. it's ok?

Thanks Doc Al now I understand :biggrin: . But tell me what is wrong in this?

This is because the charged boy is an electric field, and the free charges on the conductor will move?

I wanted to say:"The gaussian surface is inside the conductor, so the electric field on the gaussian surface is zero. Then the flux through the gaussian surface is zero. This implies that q_in must be zero (q_in is the net charge inside the gaussian surface). So the fact that charges resides...

Thanks guys. I have made this solution, it's ok?? http://img179.imageshack.us/img179/3599/solutiondo0.png And in the case b, when the charged brother touches the inner surface the charges will move and will give a shock. it's ok?

Thanks for reply :biggrin: But why the charge is in the outer surface? I thought that the charge of the conductor resides on its surface whether inner or outer :confused:

Hi there, I was reading the Serway's physics book and I don't understand this quiz neither the solution. I mean, if the solution is a, what's the difference with option b? http://img140.imageshack.us/img140/6812/gaussslawud7.png The "Quick Quiz" is in the chapter "Gauss's Law", under the...