1What is the combination of cells, and why is it done?
2Write the difference between the series and the parallel combination of cells.
3What difference does increasing the number of cells make to the brightness of a bulb in a series combination?
4In a parallel combination, adding more cells does not make the bulb brighter. What does change, and why?
5Write two uses of the series combination and two uses of the parallel combination of cells.
6You have a torch that needs 3 V and two cells of 1.5 V. What combination should you make, and what is the benefit?
7A torch has good cells but does not light at all. How could a series combination be the cause?
8Draw and describe a circuit in which two dry cells are used, showing series and parallel arrangements.
9Why does the parallel combination look like it does nothing, until you measure the time?
10Two cells are joined so that the positive pole of one is wired to the positive pole of the other. Name the combination and describe what it will do.