Two types of lamps are given below.
Filament lamp.
Why is it said that the use of filament lamp must be controlled ?

Two types of lamps are given below . Discharge lamp If nitrogen gas is filled in each lamp,what change will happen to their working ?

A filament lamp is lit for a short period of time . Touch it . What do you feel ?

You are given two filament lamps of resistance 750 Omega and 1000 Omega . Of these , which has more power ?

Nichrome is not used as filament in incandascent lamp . Why ?