In electronic circuits using operational amplifiers (op-amps), what is the purpose of a "virtual ground"?To create a real electrical connection to the Earth's surface.To eliminate the need for power supplies.To provide a reference point for signal voltages.To increase the input impedance of the op-amp.Clear my choice
Question
In electronic circuits using operational amplifiers (op-amps), what is the purpose of a "virtual ground"?To create a real electrical connection to the Earth's surface.To eliminate the need for power supplies.To provide a reference point for signal voltages.To increase the input impedance of the op-amp.Clear my choice
Solution
The purpose of a "virtual ground" in electronic circuits using operational amplifiers (op-amps) is to provide a reference point for signal voltages. This concept is used in op-amp circuits to simplify analysis of the circuit. The term "virtual" is used because there is no physical ground connection.
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