Advertisements
Advertisements
प्रश्न
What changes in energy occur in an electric bulb?
Advertisements
उत्तर
In an electric bulb, electrical energy changes to heat and light energy.
संबंधित प्रश्न
Define Electric power.
What is the resistance, under normal working conditions of a 240 V electric lamp rated at 60 W? If two such lamps are connected in series across a 240 V mains supply, explain why each one appears less bright.
State two advantages of filling an inert gas in an evacuated electric filament lamp.
Name a metal that is used as an electron emitter. Give one reason for using this metal.
A bulb is connected to a battery of e.m.f. 6V and internal resistance 2Ω A steady current of 0.5A flows through the bulb. Calculate the resistance of the bulb.
Unit of electric power may also be expressed as:
A cooler of 1500 W, 200 volts and a fan of 500 W, 200 volts are to be used from a household supply. The rating of fuse to be used is:
What is the meaning of electric power of an electrical device? Write its SI unit.
