Question

What is the maximum efficiency of a heater?

Answer 1

any numbers?

Answer 2

Say a number or how it can be find.

Answer 3

eh? that's the question?
note that max efficiency differs from heater to heater.
use this eq to find the perfect input-output: Q=IRt
and then measure the heat output of the heater.

Answer 4

I asked about efficiency not output!
what percent of energy is converted to heat in heater and it can be increased?

Answer 5

yes. you'll need to know the input and output to know the efficiency, isn't it?
efficiency =output energy / input energy.
the input energy can't really be measured, but the output can be.

Answer 6

wait. are you required to answer in an essay or is this a project?

Answer 7

It is just a question for myself.

Answer 8

oh. well then, it's the answer above. though if you want to measure it it's quite cumbersome.

Answer 9

100%

Answer 10

I think 100% is true. Do you think that it is always 100% or in some condition?

Answer 11

lol I think what vincent sez is that maximum efficiency is always 100%...that's maximum...lol

Answer 12

A heater convert work to thermal energy, which can be obtained with a 100% efficiency => all electrical energy becomes thermal energy in the end.

Whereas the opposite is not possible. You need a machine, and this machine will only yield a maximum efficiency less than 100%, actual value depending on the temperatures of the heat sources.

Answer 13

If you want to convert electricity into heat then you can get near 100% efficiency. There are also heaters called heat pumps that extract heat from cold air (cooling it off even more) and then putting that heat into the house. They can, for instance, move 1,000 J of heat point A to point B, while only consuming 400 J of electricity themselves. A term you might look for is Coefficient of Performance. Here's a primer: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatpump.html