In a simple DC circuit, the resistance is held constant while the applied voltage is halved. What will be the effect on the current flow as compared to the original current?

Correct Answer: Option D — be divided by two

Ohm's law proves that current is directly proportional to voltage when resistance remains constant ($I = \frac{V}{R}$). Halving the applied voltage while keeping resistance unchanged reduces the resulting current flow proportionally by a factor of two, satisfying standard marine electrical theory.