CELLS AND SIMPLE CIRCUITS

1.          1995 Q12 P1
State two advantages of an alkaline battery over a lead acid battery  (2 marks)
2.          1996 Q19 P1
In large current circuits large resistors in parallel are preferred to low resistors in series explain (2marks)
3.           1998 Q10 P1
A car battery requires topping up with distilled water occasionally. Explain why this is necessary and   why distilled water is used.
4.          2000 Q10 P1
State one advantage of an alkaline accumulator over a lead – acid accumulator.

dry cell (Luclache’)

5.           2001 Q10 P1
Explain how polarization reduces current in simple cell.
6.          2003 Q10 P1
State one advantage of a lead – acid accumulator over a nickel – iron (NiFe) accumulator.
7.          2004 Q9 P1
State the purpose of Manganese dioxide in a dry cell
8.         2005 Q9 P1
Fig 7 shows the features of a dry cell (Luclache’).  Use the information in the figure to answer question 9 and 10











State the polarities of the parts labelled A and B.       (1mark)
9.          2005 Q10 P1
 Name the chemical substance in the parts labelled C and D     (2marks)
C…………
D…………
10.          2006 Q4 P2
State a reason why the caps of the cells of a lead- acid battery are opened when charging the battery.   (1 mark)
11.          2007 Q2 P2
State one advantage of an alkaline cell over a lead – acid cell   (1 mark)
12.          2009 Q4 P2
Give a reason why it is necessary to-leave the caps of the cells open when charging an accumulator  (1 mark)
13.     2012 Q3 P2                          
Figure 3, shows four identical light bulbs connected to a 15 volt battery whose internal resistance is negligible.

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Determine the reading of the voltmeter V.     (2marks)