An electric heater is an electrical device that converts electric current to heat. The heating element inside every electric heater is an electrical resistor, and works on the principle of Joule heating: an electric current passing through a resistor will convert that electrical energy into heat energy.he direct electric heat exchangers (DEHE) uses heating elements inserted into the shell side medium directly to provide the heating effect. Virtually all of the electric heat generated by the electric circulation heater is transferred into the medium, thus an electric heater is nearly 100 percent efficient.
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are very small; typical sizes are around 100 picometers (a ten-billionth of a meter, in the short scale).
An atom is a compound state of a nucleus and one or more electrons. This system has a certain amount of energy; one kind of energy is that of the electrons which revolve around the nucleus. There exists a state, called ground states, in which this energy is the smallest. Also there exist some other states where the electrons revolve faster or farther from the nucleus; in these states, the energy of the electrons (and the atom on the whole) is higher. These are called excited states (of the atom). â AstoundingJB Mar 13 '14 at 14:43 @AstoundingJB The further the electron is from the nucleus, the slower the speed.