Question

What is the resistance of the galvanometer?

Answer 1

Hint : Galvanometer has gone through several modifications since its invention in the 1800s. Tangent galvanometers, Astatic galvanometers, Mirror galvanometers, and Ballistic galvanometers are some of the many types of galvanometers. However, the D'Arsonval/Weston type, often known as the moving coil type, is the most commonly used galvanometer today. A galvanometer is a name that has been given to a moving coil electric current detector in the past.

Complete Step By Step Answer:
A galvanometer is an electric current measurement instrument that is electromechanical. Early galvanometers were uncalibrated, but later versions, known as ammeters, were calibrated and could more precisely detect current flow. A galvanometer responds to an electric current running through a coil in a constant magnetic field by deflecting a pointer. Galvanometers can be viewed as a type of actuator. Galvanometers have played an important role in the advancement of science and technology in a variety of disciplines. For example, underwater cables facilitated long-distance communication in the 1800s.
If a galvanometer exhibits a bigger deflection for a little amount of current, it has a higher sensitivity. Current sensitivity and voltage sensitivity are the two forms of sensitivity. The resistance of the galvanometer coil is around 100 ohms. A galvanometer is a device that detects tiny electrical currents in a circuit. The galvanometer coil deflects as electricity flows through it. The resistance of an ideal galvanometer should be zero. The galvanometer, in actuality, has a very low resistance of 100 ohms. A little current should be able to pass through the galvanometer. When current runs through the galvanometer, it deflects.

Note :
The coil creates a magnetic field when a direct current (DC) runs through it. The permanent magnet is affected by this field. The pointer moves when the coil twists and pushes against the spring. The hand is pointing to a scale that represents the electric current. The magnetic field is homogeneous thanks to the careful construction of the pole pieces, thus the angular deflection of the pointer is proportionate to the current. The mechanical resonance of the moving coil and pointer is usually dampened in an usable metre, so the pointer settles fast to its location without oscillation.