State ONE function of the collector resistor in FIGURE 5.2 - NSC Electrical Technology Electronics - Question 5 - 2019 - Paper 1
Question 5
State ONE function of the collector resistor in FIGURE 5.2.
Explain how $V_{CE}$ becomes equivalent to $V_{CC}$ when $R_L$ is open.
With reference to biasing, expl... show full transcript
Worked Solution & Example Answer:State ONE function of the collector resistor in FIGURE 5.2 - NSC Electrical Technology Electronics - Question 5 - 2019 - Paper 1
Step 1
State ONE function of the collector resistor in FIGURE 5.2.
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Answer
The collector resistor in this configuration serves to limit the collector current flowing through the transistor, thereby protecting the transistor from damage due to excessive current.
Step 2
Explain how $V_{CE}$ becomes equivalent to $V_{CC}$ when $R_L$ is open.
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Answer
When the load resistor RL is open, there is no current flow through it. As a result, the entire supply voltage VCC appears across the collector-emitter junction, leading to VCE being equal to VCC.
Step 3
With reference to biasing, explain Class A amplification.
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Answer
Class A amplification operates with the transistor in the active region throughout the entire input signal cycle. This means that the transistor is always conducting, regardless of the input signal. The biasing is set such that it allows for linear amplification, leading to minimal distortion in the output signal.
