Home
Class 10
PHYSICS
Explain the following: Why is the tungs...

Explain the following: Why is the tungsten used almost exclusively for filament of electric lamps?

Text Solution

Verified by Experts

The melting point and resistivity of tungsten are very high. It does not burn readily at a high temperature. The electric lamps glow at very high temperatures. Hence, tungsten is mainly used as heating element of electric bulbs.
Doubtnut Promotions Banner Mobile Dark
|

Similar Questions

Explore conceptually related problems

Explain the following: (a) Why is the tungsten used almost exclusively for filament of electric lamps? (b) Why are the conductors of electric heating devices, such as bread-toasters and electric irons, made of an alloy rather than a pure metal? (c ) Why is the series arrangement not used for domestic circuits? (d) How does the resistances of a wire vary with its area of cross sections? (e ) Why are copper and aluminium wires usually employed for electricity transmission?

Explain Why is the tungsten used almost exclusively for filament of electric lamp?

Knowledge Check

  • ____ is the metal used for making filaments of electric bulbs

    A
    Iron
    B
    Tungste
    C
    Silver
    D
    Nickel

  • Tungsten is used for the manufacture of the filament of an electric bulb because

    A
    it is a good conductor
    B
    it is economical
    C
    it is malleable
    D
    it has a very high melting point

    • Similar Questions

    Explore conceptually related problems

    Explain the following : (a) Why is tungsten used almost axclusively for filament of incandescent lamp ? (b) Why are the conductors of electric heating devices, such as toaster and electric irons, made of an alloy rather than a pure metal ? ( c) Why is the series arrangement not used for domestic circuits ? (d) How does the resistance of a wire vary with its cross-sectional area ? (e ) Why are copper and aluminimum wires usually employed for electricity transmission.

    (a) Justify the following statements (i) Tungsten is used exclusively for filament by electric lamps (ii) We do not use series arrangement for domestic circuits. (b) A wire of resistance 8Omega is bent in the form of a closed circle. What is the effective resistance between two points A and B at the ends of any diameter of the circle ?

    Explain why, tungsten is used for making the filaments of electric bulbs.

    A metal used to make the filament of an electric bulb.

    A metal used to make the filament of an electric bulb.

    Why is tungsten used to make solenoid type coil in an electric bulb?

    Home
    Profile