PSI Barbering Practice Exam

What term indicates the negative or positive pole of an electric current?

1. Voltage

2. Polarity

3. Current flow

4. Resistance

The correct answer is: Polarity

The term that indicates the negative or positive pole of an electric current is polarity. Polarity refers specifically to the direction of the electric current flow in relation to its two terminals: the positive (+) and the negative (-). Understanding polarity is crucial in the context of electrical devices, as it influences how devices are connected, ensuring proper functioning and preventing damage. Voltage refers to the electrical potential difference between two points and is not directly indicative of the poles. Current flow describes the movement of electric charge through a conductor but does not specify the poles involved. Resistance measures how much a material opposes the flow of current, but again, it does not pertain to the concept of polarity. Thus, polarity is the key term that describes the positive and negative aspects of electric current.