Coil present in electrical water heater made up of which alloy:

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Nichrome

Steel

Brass

Aluminium bronze

answer is A.

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Detailed Solution

Concept- Nichrome is a preferred alloy for the coil of a water heater due to its high resistivity. It results in the formation of voids, just like in its lattice arrangement, which is made up of the metals nickel (80%) and chromium (20%).
Nichrome is an alloy which is basically made up of nickel and chromium. It has high heating properties due to which it is used in electrical water heaters. So, the coil of an electrical water heater is made with nichrome, a mixture of nickel and chromium.Nichrome is an alloy used to create the heating elements for electric heating appliances. A combination of nickel, chromium, and ( and sometimes iron and other elements or substances). Resistance wire is made of it.
Hence, option 1 is correct.

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