Question

What is the frequency of DC signal?

Answer 1

1. Direct current (DC): Direct current always flows unidirectionally which means in a specific direction or we may say that it does not changes its direction, and always have the same strength throughout its flow.
2. Frequency of DC signal: The frequency of DC signal is zero, remember that frequency of DC signal zero does not mean zero current.

Therefore the frequency of the DC signal is zero.