The electric current in a closed circuit always flows from the _______...
The electric current always flows from the higher potential to lower potential. The positive terminal of an electric cell is at higher potential with respect to its negative terminal. Hence, in the given circuit, the current will flow from terminal P to terminal N.
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The electric current in a closed circuit always flows from the _______...
Answer:
Introduction:
An electric cell is a device that provides a steady flow of electric current. It has two terminals - a positive terminal (+) and a negative terminal (-). When a closed circuit is connected to an electric cell, the electric current flows from one terminal to the other. In this question, we need to determine the direction of the electric current flow in a closed circuit connected to an electric cell.
Explanation:
The correct answer is option B - the electric current flows from the positive terminal to the negative terminal of the electric cell.
Direction of Electric Current:
To understand why the electric current flows from the positive terminal to the negative terminal, let's consider the flow of electrons. Electrons are negatively charged particles that carry electric current. In a closed circuit connected to an electric cell, the flow of electrons is opposite to the direction of the conventional current.
Conventional Current:
Conventional current is the flow of positive charges. It was defined before the discovery of electrons and is used to describe the direction of current flow. According to the convention, the current flows from the positive terminal to the negative terminal of the electric cell.
Flow of Electrons:
Electrons flow from the negative terminal to the positive terminal of the electric cell. They are repelled by the negative terminal and attracted towards the positive terminal. Therefore, the electrons flow in the opposite direction to the conventional current.
Conclusion:
In a closed circuit connected to an electric cell, the electric current flows from the positive terminal to the negative terminal. This is because the electric current is the flow of positive charges (conventional current), while the flow of electrons (actual current) is in the opposite direction.
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