Science
Explain the following:
Why is the tungsten used almost exclusively for filament of electric lamps?
Related Questions
Which uses more energy, a 250 W TV set in 1 hr, or a 1200 W toaster in 10 minutes?
An electric heater of resistance 8 Ω draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.
Explain the following:
Why are the conductors of electric heating devices, such as bread-toasters and electric irons, made of an alloy rather than a pure metal?
Explain the following:
Why is the series arrangement not used for domestic circuits?