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For a CE transistor amplifier, the audio signal voltage across the collector resistance of 2.0 kW is 2.0 V. Suppose the current amplification factor of the transistor is 100, What should be the value of RB in series with VBB supply of 2.0V if the dc base current has to be 10 times the signal current?
- a)14 kΩ
- b)18 kΩ
- c)10 kΩ
- d)5 kΩ
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
For a CE transistor amplifier, the audio signal voltage across the col...
Given Data:
- Collector resistance (RC) = 2.0 kΩ
- Audio signal voltage across RC = 2.0 V
- Current amplification factor (β) = 100
- DC base current = 10 times the signal current
- VBB supply = 2.0 V
Calculations:
Step 1: Calculate the signal current (Isignal):
- Signal voltage across RC = 2.0 V
- Using Ohm's Law: Isignal = Vsignal / RC = 2.0 V / 2.0 kΩ = 1.0 mA
Step 2: Calculate the base current (IB) and collector current (IC):
- IB = 10 * Isignal = 10 * 1.0 mA = 10 mA
- IC = β * IB = 100 * 10 mA = 1.0 A
Step 3: Calculate the base voltage (VB):
- VB = VBB - IB * RB
- VB = 2.0 V - 10 mA * RB
Step 4: Calculate the value of RB:
- Given that VB = 0 (transistor in cutoff region for AC signal):
- 0 = 2.0 V - 10 mA * RB
- RB = 2.0 V / 10 mA = 200 Ω = 0.2 kΩ
Therefore, the value of RB in series with VBB supply should be 0.2 kΩ or 200 Ω. Among the given options, the closest value is option 'a' which is 14 kΩ.
- Collector resistance (RC) = 2.0 kΩ
- Audio signal voltage across RC = 2.0 V
- Current amplification factor (β) = 100
- DC base current = 10 times the signal current
- VBB supply = 2.0 V
Calculations:
Step 1: Calculate the signal current (Isignal):
- Signal voltage across RC = 2.0 V
- Using Ohm's Law: Isignal = Vsignal / RC = 2.0 V / 2.0 kΩ = 1.0 mA
Step 2: Calculate the base current (IB) and collector current (IC):
- IB = 10 * Isignal = 10 * 1.0 mA = 10 mA
- IC = β * IB = 100 * 10 mA = 1.0 A
Step 3: Calculate the base voltage (VB):
- VB = VBB - IB * RB
- VB = 2.0 V - 10 mA * RB
Step 4: Calculate the value of RB:
- Given that VB = 0 (transistor in cutoff region for AC signal):
- 0 = 2.0 V - 10 mA * RB
- RB = 2.0 V / 10 mA = 200 Ω = 0.2 kΩ
Therefore, the value of RB in series with VBB supply should be 0.2 kΩ or 200 Ω. Among the given options, the closest value is option 'a' which is 14 kΩ.
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Community Answer
For a CE transistor amplifier, the audio signal voltage across the col...
The output ac voltage is 2.0 V. So, the ac collector current iC = 2.0/2000 = 1.0 mA.
The signal current through the base is,
therefore given by
iB = iC /β = 1.0 mA/100 = 0.010 mA.
The dc base current has to be 10 × 0.010
= 0.10 mA.
RB = (VBB – VBE ) /IB.
Assuming VBE = 0.6 V, RB = (2.0 . 0.6 )/0.10
= 14 kW.
The signal current through the base is,
therefore given by
iB = iC /β = 1.0 mA/100 = 0.010 mA.
The dc base current has to be 10 × 0.010
= 0.10 mA.
RB = (VBB – VBE ) /IB.
Assuming VBE = 0.6 V, RB = (2.0 . 0.6 )/0.10
= 14 kW.
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For a CE transistor amplifier, the audio signal voltage across the collector resistance of 2.0 kW is 2.0 V. Suppose the current amplification factor of the transistor is 100, What should be the value of RB in series with VBB supply of 2.0V if the dc base current has to be 10 times the signal current?a)14 kΩb)18 kΩc)10 kΩd)5 kΩCorrect answer is option 'A'. Can you explain this answer?
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For a CE transistor amplifier, the audio signal voltage across the collector resistance of 2.0 kW is 2.0 V. Suppose the current amplification factor of the transistor is 100, What should be the value of RB in series with VBB supply of 2.0V if the dc base current has to be 10 times the signal current?a)14 kΩb)18 kΩc)10 kΩd)5 kΩCorrect answer is option 'A'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about For a CE transistor amplifier, the audio signal voltage across the collector resistance of 2.0 kW is 2.0 V. Suppose the current amplification factor of the transistor is 100, What should be the value of RB in series with VBB supply of 2.0V if the dc base current has to be 10 times the signal current?a)14 kΩb)18 kΩc)10 kΩd)5 kΩCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For a CE transistor amplifier, the audio signal voltage across the collector resistance of 2.0 kW is 2.0 V. Suppose the current amplification factor of the transistor is 100, What should be the value of RB in series with VBB supply of 2.0V if the dc base current has to be 10 times the signal current?a)14 kΩb)18 kΩc)10 kΩd)5 kΩCorrect answer is option 'A'. Can you explain this answer?.
For a CE transistor amplifier, the audio signal voltage across the collector resistance of 2.0 kW is 2.0 V. Suppose the current amplification factor of the transistor is 100, What should be the value of RB in series with VBB supply of 2.0V if the dc base current has to be 10 times the signal current?a)14 kΩb)18 kΩc)10 kΩd)5 kΩCorrect answer is option 'A'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about For a CE transistor amplifier, the audio signal voltage across the collector resistance of 2.0 kW is 2.0 V. Suppose the current amplification factor of the transistor is 100, What should be the value of RB in series with VBB supply of 2.0V if the dc base current has to be 10 times the signal current?a)14 kΩb)18 kΩc)10 kΩd)5 kΩCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For a CE transistor amplifier, the audio signal voltage across the collector resistance of 2.0 kW is 2.0 V. Suppose the current amplification factor of the transistor is 100, What should be the value of RB in series with VBB supply of 2.0V if the dc base current has to be 10 times the signal current?a)14 kΩb)18 kΩc)10 kΩd)5 kΩCorrect answer is option 'A'. Can you explain this answer?.
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