Answer: The correct answer is B.
Explanation:
In DC current, the electric current flows only in one direction. The rate of flow of electrons constitutes the current.
DC voltage and DC current are constant with time.
For example, battery supplies DC voltage.
In AC current, the electric current reverses its direction periodically. Here, the electrons move back and forth. AC voltage can be supplied long distances. For example, AC voltage is supplied to our home.
Step-up and step-down transformers are used to increase or decrease the voltage.
The statement is true about DC current from the given options
is "There can only be one voltage supplied".