Question

Nichrome wire is used in an electric heater because ____________.
a) It has high resistance
b) It has high melting point
c) It can resist a current upto approx 5 amperes
d) For all of the above reasons

Answer 1

d bcoz all are the reasons for it

Answer 2

Answer:

Option (d) For all the above reasons.

Explanation:

Nichrome is an alloy that contains approximately 20% chromium and 80% nickel.

Because of the below properties, it is best opted as a material in wiring of electric heaters.

• It melts only at very high temperature of 1400°C.
• It is non corrosive as it produces a protective oxide layer.
• It has high electrical resistance of about 1.40 × 10−6 Ωm