# Watts=Newton-meters per second

by Celestiela
Tags: wattsnewtonmeters
 P: 211 $$E=\frac{F_{el}}{q}$$ $$E=\frac{\Delta V}{\Delta x}$$ $$\frac{F_{el}}{q}=\frac{\Delta V}{\Delta x}$$ $$W= \Delta V q=F_{el} \Delta x$$ So the force is the electrical force, and delta x is the distance over which the potential difference is applied (so that is the little metal piece in the light bulb if the resistance in the wire is neglected). PS: You should appreciate these students. At least they pay attention :)