What is galvanometer give its construction and working?

A galvanometer is an electromechanical instrumentused for detecting and indicating an electric current. Agalvanometer works as an actuator, by producing a rotarydeflection (of a "pointer"), in response to electric currentflowing through a coil in a constant magnetic field.

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In this manner, what is galvanometer and its uses?

Galvanometer is used for detecting and measuringelectric current. The most common use ofgalvanometers was as analog measuring instruments, calledammeters, used to measure the direct current (flow of electriccharge) through an electric circuit.

Beside above, what is the unit of galvanometer? A galvanometer, or moving-coil meter has thebasic unit of micro-amps. It is often that these meters aresold as 'movements' with a rating of FSD (full scale deflection) inmicro-amps or 1 mA and a given internal resistance. Typical valuesare 50uA, 100uA and 1mA with an internal resistance of typically1900 ohms.

Keeping this in view, what is the basic principle of a moving coil galvanometer?

The principle behind moving coilgalvanometer is that when current carrying coil issuspended in a uniform magnetic field it is acted by the torque. Soit can be said that the deflection in the coil in amoving coil galvanometer is directly proportional to thecurrent flowing through the coil.

Is ammeter and galvanometer same?

The ammeter is an electronic device which isconnected in series with the circuit for measuring the currentflows through it. The construction of the galvanometer issame as that of the ammeter the only difference isthat the ammeter has additional resistance connected inparallel with the circuit.

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