If the voltage increases in a circuit while all other components stay the same, what happens to the circuit's power consumption?

If the voltage increases in a circuit while all other components stay the same, what happens to the circuit's power consumption?

• A. decrease
• B. increase
• C. remain the same
• D. oscillate

Answer: (B)

Increasing the voltage while the resistance stays the same makes the current rise, and power is the product of voltage and current. For a simple resistor, power can be written as P = V^2 / R, so when voltage goes up, P goes up as well. Doubling the voltage, for example, doubles the current and increases power by a factor of four (since power scales with the square of the voltage). This is why the circuit’s power consumption increases with higher voltage under a constant load.

Increasing the voltage while the resistance stays the same makes the current rise, and power is the product of voltage and current. For a simple resistor, power can be written as P = V^2 / R, so when voltage goes up, P goes up as well. Doubling the voltage, for example, doubles the current and increases power by a factor of four (since power scales with the square of the voltage). This is why the circuit’s power consumption increases with higher voltage under a constant load.