What material is used to make electric heater coil ?
A). Copper
B). Iron
C). Silver
D). Nichrome
Nichrome
Nichrome is a non-magnetic alloy of nickel, chromium, and often iron, usually used as a resistance wire. Patented in 1905, it is the oldest documented form of resistance heating alloy. A common alloy is 80% nickel and 20% chromium, by mass, but there are many others to accommodate various applications. It is silvery-grey in colour, is corrosion-resistant, and has a high melting point of about 1400 degree C (2552 degree F). Due to its relatively high electrical resistivity and resistance to oxidation at high temperatures, it is widely used in electric heating elements, such as in hair dryers, electric ovens, soldering iron, toasters, and even electronic cigarettes. Typically, Nichrome is wound in coils to a certain electrical resistance, and current is passed through to produce heat.
1. The number of electrons presents in H+ is
2. The natural resource known as black gold is
3. Deviations from ideal behavior will be more of the gas issubjected to-
4. ________ is used for making vinegar.
5. Chemical name of Gammaxane is
7. Super cooling stands for cooling of a liquid :
8. The cathode of a lead storage battery is made up of
9. In addition to hydrogen the other abundant element present on Suns surface is
10. The three elements most needed in common fertilisers are :