, melting of metals, tempering, hardening, and drying can be met easily by electric heating, over the other forms of conventional heating. Heat and electricity are interchangeable. Heat also can be produced by passing the current through material to be heated. This is called electric heating; there are various methods of heating a material but electric heating is considered far superior compared to the heat produced by coal, oil, and natural gas. ADVANTAGES OF ELECTRIC HEATING The various advantages of electric heating over other the types of heating are: (i) Economical Electric heating equipment is cheaper; they do not require much skilled persons; therefore, maintenance cost is less. (ii) Cleanliness Since dust and ash are completely eliminated in the electric heating, it keeps surroundings cleanly. (iii) Pollution free As there are no flue gases in the electric heating, atmosphere around is pollution free; no need of providing space for their exit. (iv) Ease of control In this heating, temperature can be controlled and regulated accurately either manually or automatically. (v) Uniform heating With electric