The power rating of a 400-Ω resistor is 0.800 W.(a) What is the maximum voltage that can be applied across this resistor without damaging it? Use three significant figures in your answer.

Explanation:

Joule's Law in Electricity

The Joule's law allows us to calculate the power dissipated in a resistor of resistance R through which goes a current I.

The relation between the voltage and the current is given by Ohm's law:

Solving for I and replacing int the first equation

Solving for V

grav potential energy

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods