K.C.S.E Physics Q & A - MODEL 2011PP2QN17
(a) State what is meant by the term “electromagnetic induction”.
(b) Figure 9, shows a simple electric generator
(i) Name the parts labelled P and Q.
(ii) Sketch on the axes provided, a graph to show how the magnitude of the potential difference across R, changes with the time t.
(iii) State two ways in which the potential difference produced by such a generator can be increased.
(c) In a transformer, the ratio of primary turns to the secondary turns is 1:10. A current of 500mA flows through a 200 ohms resistor in the secondary circuit.
Assuming that the transformer is 100% efficient, determine:
(i) the secondary voltage;
(ii) the primary voltage;
(iii) the primary current.
FORM I - PHYSICS SYLLABUS
FORM II - PHYSICS SYLLABUS
FORM III - PHYSICS SYLLABUS
FORM IV - PHYSICS SYLLABUS
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