K.C.S.E Physics Q & A - MODEL 1998PP2QN04
a) In an experiment to determine the rate at which solar energy is absorbed by a surface, an aluminum block, coated black and fitted with a heater (Fig. 3) is exposed to the sun, for a period of time. The temperature rise in noted. After the temperature of the block is allowed to fall to the initial temperature, the block is electrically heated to the temperature.
(i) Draw and labeled a circuit diagram that would be used to determine the electrical energy.
(ii) State the measurements that would be taken in (a)(i) to determine the rate of heating of the block.
(iii) Explain how the measurements stated in (a) (ii) would be used to determine the rate of heating of the block by the sun.
b) Fig 4 shows a photocell
(i) Label the cathode and anode.
FORM I - PHYSICS SYLLABUS
FORM II - PHYSICS SYLLABUS
FORM III - PHYSICS SYLLABUS
FORM IV - PHYSICS SYLLABUS
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