P4 tasks

1. Name two ways in which electricity can be produced. Identify what type of electricity is produced in each

2. What is a battery? Explain with the aid of large labelled diagrams, the difference between primary and secondary cells. Give three examples of the uses of each type.

M4 tasks

Describe the characteristics, merits and limitations of primary and secondary cells related to their home and industrial use. Your description should refer to examples of the two main types of cells – fuel cells ( such as simple cells, leclanche dry and lead-acid cells, zinc-air fuel cells, proton exchange membrane or solid polymer cells, direct methanol fuel cells ) and solar cells. It should also include the following:

a. their capacity and behaviour under load;
b. the ampere-hours/milliamperehours;
c. the disposal hazards;
d. their applications

D4 tasks

For D4 you are required to evaluate the use of primary and secondary cells for portable electronic applications such as in an mp3 player, a torch light, a TV remote controller, a toy, a personal alarm, etc.

1. Plan a short experiment to compare two portable devices which use primary and secondary cells, eg MP3 players, torches.

2. Discuss your plan with me and/or the technicians. Arrange with the technicians to have the required materials made available for your experiment.

3. Carry out the experiment and present a report of your findings following standard procedures.