A piezoelectric energy-harvesting floor tile system installed in a busy subway station corridor is used to power local LED lighting.
State the energy transfer taking place in the piezoelectric tiles when pedestrians walk over them.
During a peak rush hour, the floor tiles generate a constant current of 0.16 A.
State the equation linking charge, current, and time.
Calculate the charge transferred by the tiles in 2.5 minutes2.5\text{ minutes}2.5 minutes.
The individual piezoelectric elements within a floor tile are connected in parallel. Suggest why they are connected in parallel rather than in series.