Question

nichrome is not used as filament in filament lamps.why?​

Answer 1

Answer:

Melting point of the metal is lower than what the wire would heat up to in an evacuated globe. So,Tungsten, is used instead where the filament can reach 3200C. When the temperature is under 1000C, then Nichrome (An Alloy of Chromium and Nickel) is used as a resistance heating wire.

Answer 2

Nichrome is not used as filament in filament lamps due to its comparatively low melting point.

• Nichrome is an alloy made from nickel and chromium.
• When we apply the voltage essential for the regular filament lamps to glow, the nichrome filament lamp will only give a reddish-orange light.
• If we apply more voltage to make nichrome filament white-hot to give the required illumination, it will melt because of its low melting point.
• This is the reason why nichrome is used in filament lamps.
• But the melting point of nichrome is ideal to be used in heaters.