Which statement correctly describes the type of current produced by a $\mathrm{DC}$ generator and an $\mathrm{AC}$ generator? A $\mathrm{DC}$ generator creates a current that ? and an $\mathrm{AC}$ generator creates a current that ?.

• A. remains constant in magnitude; remains constant in direction
• B. reverses direction periodically; remains constant in direction
• C. reverses direction randomly; remains constant in direction
• D. remains constant in direction; reverses direction periodically

Answer: (D)

Verified step by step guidance

1. Understand the difference between DC (Direct Current) and AC (Alternating Current) generators: A DC generator produces current that flows in one direction only, while an AC generator produces current that changes direction periodically.
2. Recall that a DC generator creates a current that remains constant in direction, meaning the electrons flow steadily from the negative to the positive terminal without reversing.
3. Recognize that an AC generator produces a current that reverses direction periodically, typically in a sinusoidal pattern, meaning the flow of electrons switches back and forth at a certain frequency.
4. Match these characteristics to the statements given: The DC generator's current 'remains constant in direction' and the AC generator's current 'reverses direction periodically.'
5. Conclude that the correct description is: A DC generator creates a current that remains constant in direction, and an AC generator creates a current that reverses direction periodically.