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Class 10 Class 12

Electric Charges and Fields

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Conductors and Insulators

Basis of Comparison Conductor Insulator
Definition Material which allows the electric current or heat to pass through it is known as a conductor. Material which restricts the electric current or heat to pass through it is known as Insulator.
Electric Field It exists on the surface of the conductor but remains zero inside the conductor. Do not exist on the insulator.
Potential Remain same at all the point on the conductor. Remain zero.
Thermal Conductivity High Low
Covalent bond Weak Strong
Conductivity Very high Low
Resistance Low High
Electrons Freely moves in conductors. Do not move freely
Resistivity Vary from high to low High
Temperature coefficient Positive temperature coefficient of resistance Negative temperature coefficient of resistance
Examples Irons, aluminium, silver, copper, etc. Rubber, wood, Paper, etc.
Application For making electrical wires and conductor As a insulation in electrical cables or conductor, for supporting electrical equipment etc.