Figure 1: RC Triggering of SCR. The limited range of firing angle only upto 90° in the resistor trigger method of an SCR can be overcome by using RC trigger circuit of SCR. The limited range of firing angle can be increased from 90° to 180°, if the gate circuit of an SCR is supplied by […]
What is RC Triggering of SCR? Circuit Diagram, Working & Waveforms Read More »
Figure 1: PMMC Instrument. Working Principle of PMMC Instrument When a current carrying conductor is placed in a magnetic field the force is produced on the conductor (coil). This force tends to move the coil in the space. Construction of PMMC Instrument Fig. 1 shows constructional details of PMMC instruments with different constructions of permanent
An inductor is a coil or electromagnetic device that oppose any change in current. Inductors or coils, probably vary more in design than any other component. Basically, an inductor is a conducting wire wound on an insulator. Inductor is the name of a component. Its value is called as inductance.
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The transistor circuit which involves more than one stage (or) multiple stages of amplification is called a multistage amplifier or cascaded amplifier. The block schematic of a multistage amplifier is shown in figure below. The overall gain of a multistage amplifier is the product of gain of individual stages.
What is Multistage Amplifier (or Cascade Amplifier)? Block Diagram, Working & Gain Read More »
Strain gauge is a resistive type transducer which converts change in mechanical displacement into a proportional change in resistance. It is the most commonly used method of displacement measurement.
What is Strain Gauge? Working Principle, Diagram, Types, Derivation & Formula Read More »
Figure 1. Force acting on a Current Carrying Conductor placed in a Magnetic Field.
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DC voltmeter like PMMC meter works on DC supply but this meter can work on AC supply as if it is a AC voltmeter. Figure 1. What is required is an additional device to be connected between AC supply and PMMC meter is a Rectifier unit. If single diode is used as a rectifying unit for
What is an AC Voltmeter? Circuit Diagram, Working and Types Read More »
An optocoupler is a solid state electronic device, which includes a light emitter, light path and a light detector enclosed in single package. It is also referred as optoisolator, since it provides electrical isolation between any two circuits.
What is an Optocoupler? Working, Block Diagram & Applications Read More »