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Conductors and Insulators

What makes me...

Question

What makes metals good conductors of electricity?

A

No electrons

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B

Free electrons

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C

Free protons

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D

Free neutrons

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Solution

The correct option is B
Free electrons

Metals are good conductors of electricity because they possess free electrons. These free electrons help in the flow of current through the circuit.

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Q. Ever wonder when you look at things in the surrounding, what are they made up of? No? Everything in your surrounding including you, are made up of atoms. Now what is an atom? Atom is made up of electrons, protons and neutrons. Electrons revolve around the protons and neutrons. Protons are positively charged and electrons are negatively charged while neutrons have no charge. Protons are not free to move, hence only electrons can move if we provide them enough energy. The particle which is responsible for the heating of appliances is ______.

Q. In a semiconductor,
(a) there are no free electrons at 0 K
(b) there are no free electrons at any temperature
(c) the number of free electrons increases with temperature
(d) the number of free electrons is less than that in a conductor.

The ---------- of free electrons in covalent compounds make them ----------- conductors of electricity.

Q. A free neutron decays spontaneously into a proton,an electron and

- ------- -

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