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Ideal op-amp has infinite voltage gain because
- a)To control the output voltage
- b)To obtain finite output voltage
- c)To receive zero noise output voltage
- d)None of the mentioned
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Ideal op-amp has infinite voltage gain becausea)To control the output ...
As the voltage gain is infinite, the voltage between the inverting and non-inverting terminal (i.e. differential input voltage) is essentially zero for finite output voltage.
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Ideal op-amp has infinite voltage gain becausea)To control the output ...
Explanation:
An ideal operational amplifier (op-amp) is a voltage amplifying device that amplifies the difference between its input voltages. It is characterized by certain ideal properties, one of which is infinite voltage gain. The statement "Ideal op-amp has infinite voltage gain because to obtain finite output voltage" is correct. Let's understand why:
1. Definition of Voltage Gain:
Voltage gain is the ratio of the change in output voltage to the change in input voltage. It measures the amplification capability of an amplifier. A higher voltage gain means a larger output voltage for a given input voltage.
2. Ideal Op-Amp:
An ideal op-amp is a theoretical device that possesses certain ideal properties. It is assumed to have infinite input impedance, zero output impedance, infinite bandwidth, and most importantly, infinite voltage gain. These ideal properties allow the op-amp to amplify small signals accurately.
3. Infinite Voltage Gain:
The infinite voltage gain of an ideal op-amp means that it can amplify the input voltage to an arbitrarily large output voltage. This property is useful in applications where a high gain is required, such as in audio amplifiers or signal processing circuits.
4. Finite Output Voltage:
While the voltage gain of an ideal op-amp is infinite, the output voltage is not. The output voltage of an op-amp is limited by the power supply voltage or the maximum output voltage swing specified by the op-amp manufacturer. In practical applications, the output voltage of an op-amp is usually limited to a certain range to prevent distortion or damage to the circuit.
5. Role of Voltage Gain:
The purpose of having a high voltage gain in an op-amp is to amplify small input signals and provide a larger output voltage. This is important in applications where weak signals need to be amplified to a level that can be easily detected or further processed.
Conclusion:
In summary, an ideal op-amp has infinite voltage gain to amplify the input voltage to a large output voltage. However, the output voltage is ultimately limited by the power supply or the op-amp's maximum output voltage swing. The infinite voltage gain property of an ideal op-amp is crucial in many applications where signal amplification is required.
An ideal operational amplifier (op-amp) is a voltage amplifying device that amplifies the difference between its input voltages. It is characterized by certain ideal properties, one of which is infinite voltage gain. The statement "Ideal op-amp has infinite voltage gain because to obtain finite output voltage" is correct. Let's understand why:
1. Definition of Voltage Gain:
Voltage gain is the ratio of the change in output voltage to the change in input voltage. It measures the amplification capability of an amplifier. A higher voltage gain means a larger output voltage for a given input voltage.
2. Ideal Op-Amp:
An ideal op-amp is a theoretical device that possesses certain ideal properties. It is assumed to have infinite input impedance, zero output impedance, infinite bandwidth, and most importantly, infinite voltage gain. These ideal properties allow the op-amp to amplify small signals accurately.
3. Infinite Voltage Gain:
The infinite voltage gain of an ideal op-amp means that it can amplify the input voltage to an arbitrarily large output voltage. This property is useful in applications where a high gain is required, such as in audio amplifiers or signal processing circuits.
4. Finite Output Voltage:
While the voltage gain of an ideal op-amp is infinite, the output voltage is not. The output voltage of an op-amp is limited by the power supply voltage or the maximum output voltage swing specified by the op-amp manufacturer. In practical applications, the output voltage of an op-amp is usually limited to a certain range to prevent distortion or damage to the circuit.
5. Role of Voltage Gain:
The purpose of having a high voltage gain in an op-amp is to amplify small input signals and provide a larger output voltage. This is important in applications where weak signals need to be amplified to a level that can be easily detected or further processed.
Conclusion:
In summary, an ideal op-amp has infinite voltage gain to amplify the input voltage to a large output voltage. However, the output voltage is ultimately limited by the power supply or the op-amp's maximum output voltage swing. The infinite voltage gain property of an ideal op-amp is crucial in many applications where signal amplification is required.
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Ideal op-amp has infinite voltage gain becausea)To control the output voltageb)To obtain finite output voltagec)To receive zero noise output voltaged)None of the mentionedCorrect answer is option 'B'. Can you explain this answer?
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