K.C.S.E Physics Q & A - MODEL 1999PP2QN04
Figure 5 represents a simple voltage amplifier circuit.
a) i) Identify the transistor in the circuit.
ii) Explain how the base bias is produced.
iii) Describe how an alternating signal that is fed in the input V1 is amplified.
b) When a signal is fed in the input, the collector current is 2.5mA. If the current gain is 62.5 and the voltage across the transistor (VCE) is 4.5V determine the :
i) Power rating of the heater
ii) Current flowing in the circuit.
FORM I - PHYSICS SYLLABUS
FORM II - PHYSICS SYLLABUS
FORM III - PHYSICS SYLLABUS
FORM IV - PHYSICS SYLLABUS
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