# Electrons flow

1. Aug 31, 2006

### falcon102

Hi,
I wanna ask a qusetion about the electrons, what the time plays with the current flow??? what will be happen for example with current 0.5A in the wire with 5 ohm???

thx

2. Aug 31, 2006

### Swapnil

3. Aug 31, 2006

### firstme

simple.
Heat will be produced, as
H=I*I*R*t
clear?

4. Sep 2, 2006

### Slayer26M

You get power dissipation measured in watts. Ohm's law

5. Sep 5, 2006

### falcon102

simple.
Heat will be produced, as
H=I*I*R*t
clear?

could u explain more

6. Sep 5, 2006

### Staff: Mentor

That equation is meant to show that the heat energy H generated by the current flow is equal to the power P multiplied by time t. Like this:

$$H = Power * t = I^2 * R * t$$

Where I is the current and R is the resistance.

But I'm not sure that's what you are trying to ask. You might also be asking how to calculate how many electrons are flowing past a point in the wire, given the current I = 0.5A. If that is your question, you can figure it out from the fact that 1 Amp of current is equal to 1 Coulomb of charge flowing past a point per second. The charge per electron is often written as "e" with the following value:

$$e = -1.602 * 10^{-19} Coulombs$$