Basic Electrical

What is an AC Voltmeter? Definition, Block Diagram, Types, Circuit Diagram, Advantages, Disadvantages & Applications

An AC voltmeter is an electrical measuring instrument used to measure the magnitude of alternating voltage between two points in an AC circuit. Unlike a DC voltmeter, it is designed to measure voltages that continuously change in magnitude and polarity with time. AC voltmeters are widely used in electrical power systems, laboratories, and electronic circuits

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What is Summing Amplifier (Adder) Using Op-Amp? Circuit Diagram, Working, Derivation & Formula

It is possible to apply more than one input signal to an inverting amplifier. This circuit will then add all these input signals to produce their addition at the output. Such a circuit will then be called as an adder or a summing amplifier.

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What is Voltage Follower (Buffer) Using Op-Amp? Circuit Diagram, Working, Derivation & Formula

The voltage gain of the Voltage Follower (Buffer) circuit is 1 i.e. the output voltage will be equal to and in phase with the input voltage. In other words, the output voltage follows the input voltage. Hence the name voltage follower. Thus voltage follower is a non-inverting amplifier with a voltage gain of unity. Figure

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What is Inverting Amplifier Using Op-Amp? Circuit Diagram, Working, Derivation & Formula

In Inverting Amplifier, the amplified output signal will be 180º out of phase with the input signal. In other words the output signal is “inverted” as shown in Fig. 2. Therefore this amplifier is known as the inverting amplifier. Figure 1: Inverting Amplifier.

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