The reciprocal of impedance \(\left( \frac{I}{Z} \right)\) is known as admittance and its symbol is Y. The unit in which it is measured is siemens (abbreviation, S) which is the admittance of the circuit whose impedance is one ohm. Figure 1: Admittance, conductance, susceptance.
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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.
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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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.
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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
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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.
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In Single Phase Half Wave Controlled Rectifiers the load power can be controlled in only one half cycle of the input ac supply. Figure 1: Single Phase Half Wave Controlled Rectifier.
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