In a piezoelectric transducer, mechanical disruption causes what to happen?

• A. It generates an electrical signal
• B. It heats up
• C. It emits light
• D. It emits gamma rays

Answer: (A)

When you apply mechanical stress to a piezoelectric material, it generates an electrical signal. This happens because the direct piezoelectric effect causes the crystal lattice to become polarized under strain, producing charges that appear as voltage on the material’s electrodes. That voltage can be measured and used as an electrical signal representing the mechanical disturbance, such as pressure, vibration, or force. The other options—heating, light emission, or gamma-ray emission—aren’t produced by the piezoelectric effect itself, so they don’t describe what a piezoelectric transducer does in response to mechanical input.