Electrical energy to heat energy

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Now what comes to your mind when you hear the word “HEAT”. Hmmm let me guess, Iron box or water heater or hair dryers? Whatever it may be, in all those things electrical energy conversion takes place i.e. electrical energy gets converted to heat energy. An energy conversion occurs if energy changes from one form to another. energy conversions go on all around you and inside you all the time.

Resistive heating elements are quite common, and are used in coffee makers, stoves, cheap space heaters,etc. Incandescent light bulbs use resistive heating to cause a carbon filament to glow and emit light (and heat).

What is conversion of electrical energy to heat energy?

As the name suggest, conversion of electrical energy to heat energy is nothing but converting one form of energy to another form.

If a device has an input as electrical energy and it gives output as heat then this where is conversion takes place.

Example 1: for electrical energy to heat energy conversion:

The energy conversion can be easily explained with a simple example. You can even try it in your home. Just take an electrical bulb and plug its socket. Now turn on the light for 5 -10 min. Now turn off the light and touch the electric bulb, you can feel the heat in the electrical bulb. It’s because electrical energy is converted into heat energy and light energy in electric bulb.

Example 2: for electrical energy to heat energy conversion:

Now just take a coil heater. Take a bucket full of cold water and you can even check its temperature using thermometer. Now plug  the coil heater socket for 10 min. Now unplug the socket and check the temperature of  water in the bucket. You can see the raise of temperature in the thermometer. The question is how the temperature increases?? It’s because of the electrical energy conversion to heat energy.

How electrical energy is converted to heat energy

Electric heating is any process in which electrical energy is converted to heat. Common applications include space heating, cooking, water heating and industrial processes.

An electric heater is an electrical appliance that converts electrical energy into heat. The heating element inside every electric heater is simply an electrical resistor, and works on the principle of Joule heating: an electric current through a resistor converts electrical energy into heat energy. Most modern electric heating devices use nichrome wire as the active element. The heating element depicted on the right uses nichrome wire supported by heat resistant, refractory, electrically insulating ceramic.

Some of the examples for the conversion of electric energy to heat energy are

  • Radiative heaters
  • Convection heaters
  • Fan heaters
  • Lighting system
  • Heat pumps
  • Microwave oven

Points to Remember

  • An energy conversion occurs if energy changes from one form to another
  • If a device has an input as electrical energy and it gives output as heat then this where is conversion takes place.
  • Electric bulb is one of the example for electrical energy to heat energy conversion

Other types of Electric energy