(a) Explain how a Zener diode acts as a voltage regulator. (12 Marks) (b) The base current in a transistor is 0.01mA and the emitter current is 1mA. Calculate the values of ? and ??, where ? ?????? ?? have their usual meanings. (8 Marks)
QUESTION THREE – (20 MARKS)
(a) Using a clearly well labelled sketch diagram, explain the working principle of an n-type Junction Field Effect Transistor (JFET). (7 Marks)
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