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Q: In an electric circuit, flow of electric current is due to ……
  • A. electron
  • B. neutron
  • C. electrode
  • D. proton
Correct Answer: Option A - In an electric circuit, flow of electric current is due to electron. The flow of electric charges across a cross-section of a conductor constitutes an electric current. For example, a stream of electron moving through a conducting wire constitutes as electric current. The SI unit of electric charge is coulomb (C). Charges on an electron, e = 1.6 x 10⁻¹⁹ C. A charge less than this value cannot exist. Electric charge is a scalar quantity.
A. In an electric circuit, flow of electric current is due to electron. The flow of electric charges across a cross-section of a conductor constitutes an electric current. For example, a stream of electron moving through a conducting wire constitutes as electric current. The SI unit of electric charge is coulomb (C). Charges on an electron, e = 1.6 x 10⁻¹⁹ C. A charge less than this value cannot exist. Electric charge is a scalar quantity.

Explanations:

In an electric circuit, flow of electric current is due to electron. The flow of electric charges across a cross-section of a conductor constitutes an electric current. For example, a stream of electron moving through a conducting wire constitutes as electric current. The SI unit of electric charge is coulomb (C). Charges on an electron, e = 1.6 x 10⁻¹⁹ C. A charge less than this value cannot exist. Electric charge is a scalar quantity.