1) describe different types of secondary cell and describe the construction, working and uses of the Ni Cd cell.

2) describe the benefits of the fuel –cell.

3) Describe the construction, working and uses of the Dry –cell.

4) prepare a brief note on the electrode- potential.

5) Describe the term: Dielectrics and insulators.

6) describe the various classifications of the insulating materials.

7) State the properties and uses of glass wool and also thermocole.

8) describe the different properties and uses of the Teflon plastics.

9) State and describe the gaseous insulating materials.

10) describe the properties and uses of the polystyrene.