14 Questions
What property of a substance is defined as the ability to restrict the flow of electricity?
Resistance
Which of the following is NOT a good conductor of electricity?
Bakelite
What causes metals like silver, copper, and aluminium to be good conductors of electricity?
Presence of free or loosely-attached electrons
Substances that offer greater difficulty to the flow of electrons are known as:
Insulators
Which of the following is a good insulator according to the text?
Hard porcelain
What is the effect of freely moving electrons in a conductor when an electric potential difference is applied?
They collide with other atoms and electrons, producing heat.
Which substance is mentioned as relatively poor conductors of electricity?
P.V.C.
Which class of substances are good conductors of electricity?
Metals, acids, and salts solutions
Why do silver, copper, and aluminium act as very good conductors of electricity?
They have a large number of free or loosely-attached electrons in their atoms
What happens to the vagrant electrons in a conductor when an electric potential difference is applied?
They assume a directed motion
What is the main result of the collision between flowing electrons and atoms/electrons in a conductor?
Production of heat
Which of the following substances is NOT a good conductor of electricity?
Bakelite
Among the following, which can be classified as good insulators?
$ ext{Paper}$ and cotton
What is the property that substances like bakelite, mica, glass, and rubber exhibit in terms of conducting electricity?
$ ext{Insulating}$
Test your knowledge on the electric conductivity of metals and substances. Learn about how different materials affect the flow of electricity and why metals like silver, copper, and aluminium are good conductors. Understand the role of free electrons in conducting electricity.
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