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Q. Why nichrome is used as heating element in electric heating devices?
Nichrome, an alloy of nickel as well as chromium is used as the heating element for the following reasons.
(1) It has high precise resistance
(2) It has elevated melting point
(3) It is not easily oxidized
Describe NOR and NAND gates. Provide their truth tables. Discuss the nature of a p-n junction. How does a potential barrier develop at the junction.
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