Which one of the following elements the drum of a Photostat machine is made up of?
فوٹو سٹیٹ مشین کا ڈرم مندرجہ ذیل عناصر میں سے کس سے بنا ہے
Answer: Selenium
Explanation
The drum of a Photostat machine (also known as a xerox machine) is made of a material called selenium,
That is a photoconductive element.
This means that when exposed to light
It becomes conductive, allowing the machine to transfer the image onto the paper.
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