Science
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?
Related Questions
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 is the tungsten used almost exclusively for filament of electric lamps?
Explain the following:
Why is the series arrangement not used for domestic circuits?
Explain the following:
How does the resistance of a wire vary with its area of cross-section?