Now, since the needle of each of these galvanometers deflects in proportion to the strength of the current flowing through its coil, the points of these two needles keep moving with the varying currents.
In modern mirror galvanometers a deflexion of 1 mm.
Mr. Joule's improvements in galvanometers have already been incidentally mentioned, and the construction by him of accurate thermometers has been referred to.
It should never be forgotten that he first used small enough needles in tangent galvanometers to practically annul error from want of uniformity of the magnetic field.
The deflection of the magnetic needle can therefore reveal the existence of an electric current in a neighbouring circuit, and this fact was soon utilized in the construction of instruments called galvanometers (q.
Instruments called galvanometers and ammeters for the most part operate on this principle.
The mechanical force produced when a current flows in a conductor placed in a magnetic field forms the basis of the action of electric motors, and certain types of galvanometers and measuring instruments.
The magnetic field produced within a coil in which a current flows is made use of to give the deflecting couple in certain types of galvanometers and measuring instruments (see Galvanometer; Electrical Measuring Instruments).
Diagram of a form of universal shunt box for use with galvanometers of widely different resistances.
According to construction, galvanometers may be divided into two classes, as those having: 1.
The sensibility is best stated in megohms for high resistance galvanometers and in micro-volts for low resistance galvanometers, and is frequently given both for galvanometers for intermediate resistance.
Galvanometers are frequently provided with damping devices for the purpose of annulling these oscillations, thus causing the moving part to assume its final position as quickly as possible.
With reference to mirror reflecting galvanometers it may be defined in three ways.
This key is intended especially for use with D'Arsonval galvanometers in zero deflection methods.
Exhibits of original galvanometers and other apparatus will trace the development of cardiography.
Several galvanometers in the Magnetic Basement were destroyed.
Self-registering Magnetometers at the Royal Observatory, Greenwich, with Magnetic Disturbances deduced from the corresponding Terrestrial Galvanic Currents recorded by the Self-registering Galvanometers of the Royal Observatory.
To calibrate the record, a Daniell cell is put in a circuit including 1000 ohms and the three galvanometers as shunted.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "galvanometers" in a variety of sentences. We hope that you will now be able to make sentences using this word.
