What happens to current when the source voltage is increased in a circuit?

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

Answer: (C)

When the source voltage in a circuit is increased, the current typically increases as well, provided that other factors such as resistance remain constant according to Ohm's Law. Ohm's Law states that current (I) is directly proportional to voltage (V) and inversely proportional to resistance (R), represented by the formula I = V/R.

In a simple circuit with fixed resistance, increasing the voltage leads to a higher current flow because the voltage represents the electrical potential difference driving the flow of electric charge through the circuit. Therefore, with a higher voltage, there is a greater potential to push electrons through the circuit, resulting in an increase in current.

While conditions such as circuit design and the presence of components like capacitors or inductors could alter how current behaves over time with respect to voltage changes, in basic resistive circuits, the fundamental relationship holds true: raising the source voltage leads to an increase in current.