The EZPAP device uses which phenomenon to amplify an input flow?

The EZPAP device uses which phenomenon to amplify an input flow?

• A. The Coanda effect.
• B. Magnetic levitation.
• C. Thermal diffusion.
• D. Acoustic resonance.

Answer: (A)

The device relies on the Coanda effect—the jet of gas from the device clings to a nearby curved surface, creating a low-pressure region that entrains surrounding air. This entrainment boosts the total flow delivered to the patient, so the input jet is amplified. The other options don’t explain how a gas flow is drawn in and increased: magnetic levitation isn’t about fluid entrainment, thermal diffusion deals with heat transfer, and acoustic resonance involves pressure waves rather than ambient air entrainment.

The device relies on the Coanda effect—the jet of gas from the device clings to a nearby curved surface, creating a low-pressure region that entrains surrounding air. This entrainment boosts the total flow delivered to the patient, so the input jet is amplified. The other options don’t explain how a gas flow is drawn in and increased: magnetic levitation isn’t about fluid entrainment, thermal diffusion deals with heat transfer, and acoustic resonance involves pressure waves rather than ambient air entrainment.