Intensity is _____ to power.

Intensity is _____ to power.

• A. Proportional
• B. Inversely Related
• C. Equal
• D. Unrelated

Answer: (A)

Intensity measures how much power arrives per unit area. When the area is fixed, increasing power increases the energy crossing that area in the same time, so intensity grows directly in proportion to power. That’s why the best answer is that intensity is proportional to power: doubling the power doubles the intensity, and halving the power halves the intensity. The other ideas don’t fit for a fixed area: an inverse relationship would imply doubling power halves intensity, which isn’t correct; equal would mean no change with power, and unrelated would deny any link between the two.

Intensity measures how much power arrives per unit area. When the area is fixed, increasing power increases the energy crossing that area in the same time, so intensity grows directly in proportion to power. That’s why the best answer is that intensity is proportional to power: doubling the power doubles the intensity, and halving the power halves the intensity. The other ideas don’t fit for a fixed area: an inverse relationship would imply doubling power halves intensity, which isn’t correct; equal would mean no change with power, and unrelated would deny any link between the two.