Which of the following particles constitute the electric current in a metallic conductor?
A
Protons
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B
Electrons
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C
Neutrons
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D
Protons and neutrons
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Solution
The correct option is B Electrons The flow of negatively charged particles (electrons) constitutes the electric current in a metallic conductor. Protons and neutrons are boundto the nucleus of an atom and are not involved in the flow of electric current. Negative charges or electrons are comparatively free to move around in a conductor.