Ohmmeter

Definition: The meter which measures the resistance and the continuity of the electrical circuit and their components such type of meter is known as the ohmmeter. It measures the resistance in ohms. The micro-ohmmeter is used for measuring the low resistance and the mega ohmmeter measures the high resistance of the circuit. The ohmmeter is very …

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Hot Wire Instrument

Definition: The instruments which use the heating effect of the current for knowing their magnitude such type of instrument is known as the hot wire instrument. It works on the principle that the length of the wire increases because of the heating effect of the current flow through it. The hot wire instrument is used …

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Moving Iron or MI Instrument

Definition: The instrument in which the moving iron is used for measuring the flow of current or voltage is known as the moving iron instrument. It works on the principle that the iron place near the magnet attracts towards it. The force of attraction depends on the strength of the magnet field. The magnetic field …

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Fluxmeter

Definition: The meter which is used for measuring the flux of the permanent magnet such type of meter is known as the flux meter. The fluxmeter is the advanced form of the ballistic galvanometer which has certain advantages like the meter has low controlling torque and heavy electromagnetic damping. Construction of Flux Meter The construction …

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Galvanometer

Definition: The galvanometer is the device used for detecting the presence of small current and voltage or for measuring their magnitude. The galvanometer is mainly used in the bridges and potentiometer where they indicate the null deflection or zero current. Principle: The potentiometer is based on the premise that the current sustaining coil is kept …

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AC Potentiometer

Definition: The potentiometer which is used for measuring the phase and the magnitude of the unknown emf by comparing it with the known emf such type of potentiometer is known as the AC potentiometer. The working principle of the AC potentiometer is same as that of the DC potentiometer, i.e., the unknown voltage is determined by …

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Potentiometer (POT)

Definition: The instrument designs for measuring the unknown voltage by comparing it with the known voltage, such type of instrument is known as the potentiometer. In other words, the potentiometer is the three terminal device used for measuring the potential differences by manually varying the resistances. The known voltage is drawn by the cell or any …

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