Multiple choice

Motion of which of the following particles through a metallic wire is called electric current?

  1. Electron

  2. Positron

  3. Neutron

  4. Photon
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A Correct answer
Explanation

Electric current in metallic conductors is the flow of electrons. Metals have free (delocalized) electrons in their atomic structure that can move when a voltage is applied. Electrons are negatively charged particles, opposite to positrons. Neutrons are neutral and found in nuclei, while photons are light particles with no charge.

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