What happens to the current in a circuit if the voltage increases while resistance remains constant?

• A. The current decreases
• B. The current remains the same
• C. The current increases
• D. The current fluctuates

Answer: (C)

When the voltage in a circuit increases while the resistance remains constant, the current in the circuit will also increase. This relationship is derived from Ohm’s Law, which states that current (I) is equal to the voltage (V) divided by the resistance (R), or I = V/R.

If the resistance (R) remains unchanged and the voltage (V) is increased, the equation shows that current (I) must increase proportionately. For example, if you double the voltage and the resistance stays the same, the current will also double. This demonstrates a direct relationship between voltage and current, assuming that resistance does not change.

The other options do not represent the correct relationship defined by Ohm's Law. If the current were to decrease or remain the same with increased voltage, it would contradict the fundamental principles of electrical circuits, where a constant resistance leads to a directly proportional increase in current with increased voltage. Fluctuating current does not apply when considering a steady increase in voltage under constant resistance conditions.