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Assertion (A): An emitter follower is widely used in electronic instruments.
Reason (R): The voltage gain of emitter follower is very high.
Reason (R): The voltage gain of emitter follower is very high.
- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Assertion (A): An emitter follower is widely used in electronic instru...
The voltage gain of emitter follower (or common collector configuration) is less than unity i.e. a low value.
Hence, reason is not true.
Hence, reason is not true.
Most Upvoted Answer
Assertion (A): An emitter follower is widely used in electronic instru...
Assertion (A): An emitter follower is widely used in electronic instruments.
Reason (R): The voltage gain of emitter follower is very high.
The correct answer is option 'C', which states that Assertion (A) is true but Reason (R) is false.
Explanation:
Emitter Follower:
An emitter follower is a common type of transistor amplifier configuration. It is also known as a common collector amplifier because the emitter terminal is common to both the input and output sides of the circuit. The basic circuit diagram of an emitter follower is shown below.
Voltage Gain:
The voltage gain of an amplifier is defined as the ratio of the output voltage to the input voltage. In the case of an emitter follower, the voltage gain is less than 1. This means that the output voltage is slightly less than the input voltage.
Assertion (A): An emitter follower is widely used in electronic instruments.
The emitter follower configuration has several advantages that make it suitable for certain applications in electronic instruments:
1. High input impedance: The emitter follower has a high input impedance, which means that it does not load the previous stage of the circuit. This is important in electronic instruments where the signal source may have a high output impedance.
2. Low output impedance: The emitter follower has a low output impedance, which allows it to drive low impedance loads without significant loss of signal strength. This is important in electronic instruments where the output signal may need to be sent to other stages of the circuit or external devices.
3. Unity voltage gain: The emitter follower has a voltage gain close to unity, which means that it does not amplify the input signal significantly. This is important in electronic instruments where the goal is to maintain the integrity of the input signal without distortion.
Due to these advantages, the emitter follower configuration is commonly used in electronic instruments where signal buffering and impedance matching are required.
Reason (R): The voltage gain of emitter follower is very high.
This reason is incorrect. As mentioned earlier, the voltage gain of an emitter follower is less than 1. It is approximately equal to unity. Therefore, the reason provided in Reason (R) is false.
Conclusion:
Based on the explanation above, we can conclude that Assertion (A) is true because an emitter follower is widely used in electronic instruments. However, Reason (R) is false because the voltage gain of an emitter follower is not very high.
Reason (R): The voltage gain of emitter follower is very high.
The correct answer is option 'C', which states that Assertion (A) is true but Reason (R) is false.
Explanation:
Emitter Follower:
An emitter follower is a common type of transistor amplifier configuration. It is also known as a common collector amplifier because the emitter terminal is common to both the input and output sides of the circuit. The basic circuit diagram of an emitter follower is shown below.
Voltage Gain:
The voltage gain of an amplifier is defined as the ratio of the output voltage to the input voltage. In the case of an emitter follower, the voltage gain is less than 1. This means that the output voltage is slightly less than the input voltage.
Assertion (A): An emitter follower is widely used in electronic instruments.
The emitter follower configuration has several advantages that make it suitable for certain applications in electronic instruments:
1. High input impedance: The emitter follower has a high input impedance, which means that it does not load the previous stage of the circuit. This is important in electronic instruments where the signal source may have a high output impedance.
2. Low output impedance: The emitter follower has a low output impedance, which allows it to drive low impedance loads without significant loss of signal strength. This is important in electronic instruments where the output signal may need to be sent to other stages of the circuit or external devices.
3. Unity voltage gain: The emitter follower has a voltage gain close to unity, which means that it does not amplify the input signal significantly. This is important in electronic instruments where the goal is to maintain the integrity of the input signal without distortion.
Due to these advantages, the emitter follower configuration is commonly used in electronic instruments where signal buffering and impedance matching are required.
Reason (R): The voltage gain of emitter follower is very high.
This reason is incorrect. As mentioned earlier, the voltage gain of an emitter follower is less than 1. It is approximately equal to unity. Therefore, the reason provided in Reason (R) is false.
Conclusion:
Based on the explanation above, we can conclude that Assertion (A) is true because an emitter follower is widely used in electronic instruments. However, Reason (R) is false because the voltage gain of an emitter follower is not very high.
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Assertion (A): An emitter follower is widely used in electronic instruments.Reason (R): The voltage gain of emitter follower is very high.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer?
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