11. Higher Order Thinking Skills I

 

Batteries in watches are made up of primary cells, which means the reactions inside these cells are irreversible, and these cells have a short shelf-life.

 

It is impossible to recharge a primary cellvoltaic cellgalvanic cellsecondary cell. Watch batteries hold a primary cell.

When a current is generated in a primary cell, kinetic energychemical energythermal energyelectrical energy is converted to electrical energy. Whereas mobile phones use primary cellsgalvanic cellsvoltaic cellssecondary cells.

 

When current is passed through secondary cells, chemical energythermal energyelectrical energykinetic energy is converted to chemical energy, which is turned to kinetic energychemical energythermal energyelectrical energy when current is drawn from it.