How can heat produce electricity?

Question

plisss give me a web source to find it or all the details about it

i don't know anything about it and it's a science project for grade...

and i'm failing!!!!!

Answer 1

Yes, in some cases. The temperature has to be high in relation to the surrounding air. For example, a steam engine (or turbine) has a fire, which produces heat, which boils water, which makes steam, which turns a turbine, which turns a generator, which makes electricity.

Answer 2

The most simple is a thermocouple. Simply made of a junction of 2 dissimilar metals. The output is only Milli volts but very easy to produce.

Answer 3

The essential theory here is a simple derivation of the Law of Conservation of Energy: though energy cannot be destroyed, it can be converted between types (and in some cases be made into matter). A reaction that is directly obverse to the one you're asking about is probably occurring within your computer right now (inefficient electrical conduction makes heat energy... It's how a toaster works).

The specific term for what I think you're looking for is called thermoelectic power generation, and a link is here: http://en.wikipedia.org/wiki/Thermoelect...