1.

A photostat machine works on

Answer»

 Electrostatic image making



All Electrostatic Copiers work under the premise that a charge of electricity is placed on an Image Drum which has the ability to retain the electric charge much like a capacitor holds its charge but with the ability to hold or RELEASE the charge DEPENDING on how much light and darkness is applied to the Image Drum. A photocopier (also known as a copier or copy machine) is a machine that makes paper copies of documents and other visual images QUICKLY and cheaply. Most current photocopiers use a technology called xerography, a dry process using HEAT. Copiers can also use other TECHNOLOGIES such as ink jet, but xerography is standard for office copying.



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