If the beam area is doubled while intensity remains unchanged, power will

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Multiple Choice

If the beam area is doubled while intensity remains unchanged, power will

Explanation:
Power in an ultrasound beam is the product of its intensity and its cross-sectional area. If the beam area doubles while intensity remains unchanged, the power doubles because P = I × A and A becomes 2A with I constant. In other words, increasing area while keeping intensity fixed scales power proportionally: quadrupling the area would quadruple the power, leaving the area unchanged would keep power the same, and halving the area would halve the power.

Power in an ultrasound beam is the product of its intensity and its cross-sectional area. If the beam area doubles while intensity remains unchanged, the power doubles because P = I × A and A becomes 2A with I constant. In other words, increasing area while keeping intensity fixed scales power proportionally: quadrupling the area would quadruple the power, leaving the area unchanged would keep power the same, and halving the area would halve the power.

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