The correct option is From positive to negative terminal of the cell.
Explanation
Electric current is defined as the rate of flow of electric charge. By historical convention, the direction of electric current is taken as the direction of the flow of positive charges. This is known as conventional current.
Detailed Analysis:
- External Circuit: In the external circuit (wires and components connecting the terminals), conventional current flows from the region of higher potential (positive terminal) to the region of lower potential (negative terminal).
- Internal Circuit: Inside the cell or battery, the current flows from the negative terminal to the positive terminal to complete the closed loop.
- Electron Flow: Electrons are negatively charged particles. Therefore, the actual flow of electrons in the external circuit is from the negative terminal to the positive terminal, which is opposite to the direction of conventional current.
Since the question specifically asks for the direction of conventional current in the external circuit, it flows from the positive to the negative terminal.
Key Takeaway:
Conventional current flows from Positive to Negative in the external circuit, whereas electron flow is from Negative to Positive.