Question

Electric conductors are materials or substances that allow electricity to pass through them. Which one of the following is a good conductor?
A) Cloth
B) Paper
C) Wood
D) Iron

Answer 1

Hint : Conductor is the substance which allows electricity or current to flow through them. Conductors which allow electrons to flow easily inside them. Semiconductor is materials which have conductivity between conductors and insulators. Examples of semiconductors are silicon or germanium. Semiconductor will have high thermal conductivity.

Complete step-by-step solution:
Non-conductors of electricity are nothing but an insulator. An insular is a substance which does not allow current flow through them. There is no free electron in insulators and insulators which are bad conductors of electricity wood, air, plastic and glass are the some materials which are bad conductors of electricity.
Pure water is also a bad conductor of electricity. Current will flow due to ionic concentration in pure water there is less ionic concentration.
As we all know that cloth and paper which does not allow current so they are non-conductor of electricity.
Iron which has metallic bonds due to which electrons are free to move around more than one atom and this is called delocalization. Iron is a good conductor of electricity and heat. Iron has a high specific mass
So the correct option is D.

Note: Students in conductor’s free electron are present. As the ionic concentration increases the current flow also increases and SI unit of current is Ampere (A).Semiconductors will have some properties that are variable electrical conductivity, heterojunctions, light emission, excited electrons and thermal energy conversion.