Which of the following particle(s) are responsible for flow of electric current in a conductor?

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Protons

Free electron

Both 1 and 2

None of these

answer is B.

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Detailed Solution

Free electrons are responsible for the current in conductors.
Current in conductors is caused by free electrons. Free electrons are valence shell electrons with a weaker force of attraction to the nucleus, allowing them to move freely in the metal and conduct current (conductor). An electric current is the rate at which charge flows per unit time. The electric current is made up of the movement of electrons in a wire. Protons and neutrons are found within an atom's nucleus. Charge carriers are the moving-charged particles in an electric current.

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