Question

Which crystal is put in watches to help them keep time?

Answer 1

The crystal that is put in watches to help them keep time is called a quartz crystal or simply a watch crystal. Quartz watches use the piezoelectric effect of the crystal to provide a stable reference for timekeeping. 

Answer 2

The crystal that is put in watches to help them keep time is quartz. Quartz is a type of crystal that vibrates at a very precise frequency when an electric current is applied to it. This vibration is used to power the mechanism of the watch, and helps it keep accurate time.

Answer 3

The crystal that is put in watches to help them keep time is called a quartz crystal. This crystal vibrates at a very precise frequency when an electrical current is applied to it, which makes it an ideal component for keeping time in watches.