$(a)$ Why is the series arrangement not used for domestic circuits ?
$(b)$ Why is the tungsten used almost exclusively for filament of electric lamps ?
$(c)$ Why are the conductors of electric heating devices such as bread toasters and electric irons made of an alloy rather than a pure metal ?
$(d)$ Why are copper and aluminium wires usually employed for electricity transmission ?
(e) Why does the cord of an electric heater not glow while the heating element does ?
$(a)$ Why is the series arrangement not used for domestic circuits ?
$(b)$ Why is the tungsten used almost exclusively for filament of electric lamps ?
$(c)$ Why are the conductors of electric heating devices such as bread toasters and electric irons made of an alloy rather than a pure metal ?
$(d)$ Why are copper and aluminium wires usually employed for electricity transmission ?
(e) Why does the cord of an electric heater not glow while the heating element does ?
$(a)$ In the series arrangement, if any one of the component stops working, then the circuit gets broken up and none of the device will work.
$(b)$ High resistivity and high melting point.
$(c)$ Alloys have a higher value of resistivity and produce more heat. They do nót oxidise at high temperatures.
$(d)$ They have very low values of resistivity and current flows easily.
$(e)$ Cord of an electric heater has very low resistance, heating element is made$-$up of a material having high resistance.
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