Tag: electric charges and fields

When we touch a charged object, our body conducts its charges to the earth. That is why a charged body loses its charge, if we touch it with our hand. Human body is a very good conductor of electricity.

Answer is D.

Bakelite, or polyoxybenzylmethylenglycolanhydride, is an early plastic. It is a thermosetting phenol formaldehyde resin, formed from an elimination reaction of phenol with formaldehyde. It was developed by Belgian-born chemist Leo Baekeland in New York in 1907.
One of the first plastics made from synthetic components, Bakelite was used for its electrical nonconductivity and heat-resistant properties in electrical insulators, radio and telephone casings, and such diverse products as kitchenware, jewelry, pipe stems, firearms, and children's toys.
If the Bakelite is dry, it won't conduct electricity, however if it is wet and a high enough voltage is applied to it, it might conduct electricity.

Distilled water  is bad conductor of electricity.

Metals have electronic configuration such that there is always one, two or three electrons present which lie in the outer most shell and are loosely bounded. Therefore, in metals there are always more free electrons. 

The current does not flow through the insulators. We know that a large amount of current will flow through the conductor due to the presence of free electrons. Relatively small amount of current also flow through semiconductors or some alloys. 

The given statement is false because copper is not a good conductor of electricity as compared to glass, The reason is that glass is usually an insulator and have electrons held tightly which means they aren't shared between other atoms, so it is a poor conductor of electricity whereas copper is a metal and has free electrons in it and therefore is good conductor of electricity.

The given statement is false,  because pure water is not a good conductor of electricity. Because water itself isn't a conductor. It i the presence of salts in an impure water that makes it conductive. But in pure water, it has all salts removed from it and therefore, pure water is then devoid of free ions and hence not a good conductor.

In conductors electrons can flow because their because their electrons are free and mobile.