Question

Write true or false for the following statements: Resistance of a piece of rubber is more than that of a piece of copper
(A) True
(B) False

Answer 1

Hint
We can compare the resistance of copper and rubber by observing the flow of current in both the pieces. If the current flowing is high, then the resistance offered by the substance is low.

Complete step by step answer
As we know that rubber is an insulator that is rubber does not allow free flow of charges or current, hence the resistance is more and at the same time, copper is a conductor which allows the flow of current offering low resistance.
Hence the given statement – resistance of a piece of rubber is more than that of a piece of copper is true.
Answer is (A); True

Additional Information
Conductors have a large number of free electrons which act as charge carriers. They have partially filled the valence energy band. Examples are metals, tap water and the human body. Insulators practically have no free electrons and their valence band is completely filled. Examples are Diamonds, rubber. Apart from conductors and insulators there are materials whose conductivity is in between that of these two , such materials are called ‘semiconductors’. A semiconductor behaves as an ideal insulator at absolute zero.The properties of insulator and conductor is because of its structure and electrical nature of atoms.

Note
Resistance is a characteristic of a material which resists the flow of current in a material. Mathematically it is the ratio of potential difference to current. Resistance of a material depends on the dimensions (length and area of cross section), composition and temperature. The unit of resistance is ohm ($\Omega$) .