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Question

Which of the following statements is true about the flow of electrons in an electric circuit?


A
Electrons always flow from lower to higher potential
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B
Electrons always flow from higher to lower potential
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C
Electrons flow from lower to higher potential except through power sources
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D
Electrons flow from higher to lower potential, except through power sources
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Solution

The correct option is C Electrons flow from lower to higher potential except through power sources
Answer is C.
Electricity is the flow of charge. Usually our charges will be carried by free-flowing electrons. Negatively-charged electrons are loosely held to atoms of conductive materials. With a little push we can free electrons from atoms and get them to flow in a generally uniform direction.A closed circuit of conductive material provides a path for electrons to continuously flow. The charges are propelled by an electric field. We need a source of electric potential (voltage), which pushes electrons from a point of low potential energy to higher potential energy.
On a power source, electricity flows from the positive terminal to the negative terminal. However, electrons flow from negative to positive.
Hence, electrons flow from lower to higher potential except through power sources is true.

Physics

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