The piezoelectric effect

Piezoelectric quartz is

• nitrous oxide

• carbon dioxide

• silicon dioxide

• sulphur dioxide

A dipole bond is

• any two atoms joined together

• any two different kinds of atoms joined together

• two atoms joined together with opposite charges at the ends

Look at the diagram. In a silicon=oxygen dipole:

• silicon is slightly positive

• oxygen is slightly positive

• silicon is slightly negative

• oxygen is slightly negative

Which bonds are dipoles?

• 
• 
• 
• 

To be piezoelectric, the molecular structure of a material must:

• have point symmetry

• lack point symmetry

• have rotational symmetry

• lack rotational symmetry

Diamond is not piezoelectric, because

• it is too hard to compress it

• all the atoms have neutral charge

• it doesn't have the right crystal geometry

(draw a face)

Answer explanation

the negative end