Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal ?

Give scientific reasons: The coils in heating devices such as a toaster and electric iron are made of an alloy such as Nichrome, rather than a pure metal.

Why is a photoelectric cell also called an electric eye?

What is the origin of electrical conductivity of metals?

What is the origin of electrical conductivity of metals?

Give Scientific reasons: In the electric equipment's producing heat e.g. iron, electric heater, boilers, toaster etc. and alloy such as Nichrome is used, not pure metal

True or false The filament in the electric bulb is made of a wire with high melting point

Why does a metal wire used for electrical transmission sag?

Give scientific reasons: The filament of an electric bulb is made of tungsten.