Multiple Choice Question (MCQ)
Question: Which is the polarity of direct current (DC)?
A.
Phase (L) and Neutral (N)
B.
Phase (L) and Negative (-ve)
C.
Positive (+ve) and Neutral (N)
D.
Postive (+ve) and negative (-ve)
Correct Answer: Postive (+ve) and negative (-ve)
Explanation
In a direct current (DC) circuit, current flows in one direction only, and one pole is always negative and the other pole is always positive. In an alternating current (AC) circuit the two poles alternate between negative and positive and the direction of the current (electron flow) reverses periodically.