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On applying a positive voltage signal to the' base of a normally biased n-p-n CE transistor amplifier
- a)emitter current will fall
- b)collector current will fall
- c)base current will fall
- d)collector voltage will become less positive
Correct answer is option 'D'. Can you explain this answer?
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On applying a positive voltage signal to the base of a normally biased...
Explanation:
When a positive voltage signal is applied to the base of a normally biased n-p-n CE (common emitter) transistor amplifier, the following changes occur:
1. Increase in base current:
When a positive voltage signal is applied to the base, it increases the forward bias on the base-emitter junction. This causes an increase in the base current (Ib) flowing from the base to the emitter.
2. Increase in collector current:
With an increase in base current, the transistor's current gain (β) causes a larger increase in the collector current (Ic). The collector current is given by the equation: Ic = β * Ib. Therefore, when Ib increases, Ic also increases.
3. Decrease in collector voltage:
As the collector current increases, it causes a larger voltage drop across the collector resistor (RC) due to Ohm's law (V = I * R). This leads to a decrease in the collector voltage (VC).
Explanation of the correct answer:
The correct answer is option 'D' - the collector voltage will become less positive. This is because the increase in collector current causes a larger voltage drop across the collector resistor, resulting in a decrease in the collector voltage.
When a positive voltage signal is applied to the base of a normally biased n-p-n CE (common emitter) transistor amplifier, the following changes occur:
1. Increase in base current:
When a positive voltage signal is applied to the base, it increases the forward bias on the base-emitter junction. This causes an increase in the base current (Ib) flowing from the base to the emitter.
2. Increase in collector current:
With an increase in base current, the transistor's current gain (β) causes a larger increase in the collector current (Ic). The collector current is given by the equation: Ic = β * Ib. Therefore, when Ib increases, Ic also increases.
3. Decrease in collector voltage:
As the collector current increases, it causes a larger voltage drop across the collector resistor (RC) due to Ohm's law (V = I * R). This leads to a decrease in the collector voltage (VC).
Explanation of the correct answer:
The correct answer is option 'D' - the collector voltage will become less positive. This is because the increase in collector current causes a larger voltage drop across the collector resistor, resulting in a decrease in the collector voltage.
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On applying a positive voltage signal to the base of a normally biased n-p-n CE transistor amplifiera)emitter current will fallb)collector current will fallc)base current will falld)collector voltage will become less positiveCorrect answer is option 'D'. Can you explain this answer?
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