Answer: It generates an electric potential when mechanically stressed.
- A It generates a magnetic field on compression
- B It generates an electric potential when mechanically stressed
- C It has spontaneous permanent magnetisation
- D It changes shape in an electric field without generating a charge
Correct answer: B. It generates an electric potential when mechanically stressed
Explanation: Piezoelectric materials (e.g., quartz) generate an electric potential when mechanically deformed (compressed or stretched). They are used in microphones, pressure sensors, and quartz clocks.
The three cubic unit cells: Simple Cubic has atoms only at corners; Body-Centred adds one atom at the centre; Face-Centred adds one atom at the centre of each of the 6 faces, giving the highest packing efficiency.
Concept context
Explore the ordered world of crystalline solids: unit cells, packing, defects, and how structure determines electrical and magnetic properties.