K.C.S.E Physics Q & A - MODEL 2001PP2QN05

K.C.S.E Physics Q & A - MODEL 2001PP2QN05

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​a) You are provided with 12V a.c source, four diodes and resistor.
i) Draw a circuit diagram for a full wave rectifier and show the points at which the output is taken.
AC source shown-symbols; arrangement of diode (one for each pair); correct position of R; correct position of output.
ii) Sketch the graph of the output when a capacitor is put in parallel with the resistor in the circuit in (i) above.

​b) A certain transistor is connected in common-emitter-mode. The base current IB is 0.50 ma. Determine the values of the:
(i) Emitter current IE.
(ii) Base-collector current gain beta
(iii) Current gain alpha

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