With Ohm’s law in mind, if the applied voltage increases while the resistance remains unchanged, what happens to the circuit current (qualitatively)?

Introduction / Context:
Predicting how current responds to changes in voltage or resistance is foundational for circuit design. This understanding helps in component derating, fuse sizing, and thermal management.

Given Data / Assumptions:

• Resistance is constant (linear resistor).
• Applied voltage increases.
• Ambient and temperature effects ignored.

Concept / Approach:
Ohm's law states I = V / R. With R fixed, any increase in V proportionally increases I. Power also changes: P = V * I = V^2 / R, implying a quadratic rise in power with voltage increases.

Step-by-Step Solution:
Start from I = V / R.Increase V; R constant implies I must scale up linearly with V.Implication: P rises as V^2 / R, stressing components and possibly requiring higher wattage ratings.

Verification / Alternative check:
Example: If V rises from 5 V to 10 V across 1 kΩ, current doubles from 5 mA to 10 mA, confirming the direct proportionality.

Why Other Options Are Wrong:
“Current remains the same” contradicts I = V / R.

“Power decreases” is false; power increases with V at constant R.

“Resistance decreases” changes a different variable; R is constant by premise.

“Current decreases” is opposite of the correct relationship.

Common Pitfalls:
Neglecting power dissipation when increasing voltage can cause resistor overheating or device failure.

Final Answer:
current increases