If the intensity of a sound beam remains unchanged while the beam area is reduced in half, what has happened to the power?

Study for the SPI exam. Use flashcards and multiple choice questions, each with hints and explanations. Prepare effectively for your sonography certification!

Multiple Choice

If the intensity of a sound beam remains unchanged while the beam area is reduced in half, what has happened to the power?

Explanation:
Power equals intensity multiplied by beam area. If the intensity stays the same and the beam area is halved, the total power must drop to half. For example, P = I × A; with A/2 and the same I, P' = I × (A/2) = P/2. So the power is halved.

Power equals intensity multiplied by beam area. If the intensity stays the same and the beam area is halved, the total power must drop to half. For example, P = I × A; with A/2 and the same I, P' = I × (A/2) = P/2. So the power is halved.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy