BALLISTIC GALVANOMETER DIAGRAM PDF

A galvanometer is an electromechanical instrument used for detecting and indicating an electric current. A galvanometer works as an actuator , by producing a rotary deflection of a "pointer" , in response to electric current flowing through a coil in a constant magnetic field. Early galvanometers were not calibrated, but their later developments were used as measuring instruments, called ammeters , to measure the current flowing through an electric circuit. They were the first instruments used to detect and measure small amounts of electric currents.

Author:Faumi Vibar
Country:Denmark
Language:English (Spanish)
Genre:Education
Published (Last):16 September 2011
Pages:156
PDF File Size:12.75 Mb
ePub File Size:5.35 Mb
ISBN:259-3-87940-922-3
Downloads:75664
Price:Free* [*Free Regsitration Required]
Uploader:Shaktilabar



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. The potentiometer is based on the premise that the current sustaining coil is kept between the magnetic field experiences a torque. The moving coil, suspension, and permanent magnet are the main parts of the galvanometer.

It is rectangular or circular and has the number of turns of fine copper wire. The coil is freely moved about its vertical axis of symmetry between the poles of a permanent magnet.

The iron core provides the low reluctance flux path and hence provides the strong magnetic field for the coil to move in. The other current carrying coil is the lower suspension whose torque effect is negligible. The upper suspension coil is made up of gold or copper wire which is made in the form of a ribbon. The mechanical strength of the wire is not very strong, and hence the galvanometers handle carefully without any jerks.

The beam of light placed on the scale on which the deflection is measured. The galvanometer is used as an ammeter by connecting the low resistance wire in parallel with the galvanometer.

The potential difference between the voltage and the shunt resistance are equal. As the galvanometer and the shunt resistance are connected in potential with the circuit, their potentials are equal. Thus, the shunt resistance is given as,.

The galvanometer is used as a voltmeter by connecting the high resistance in series with the circuit. The range of the voltmeter depends on the value of the resistance connected in series with the circuit.

Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Circuit Globe All about Electrical and Electronics. Electronic Instrumentation. Circuit Globe Electrical Measurement Galvanometer.

Good observation. It should be high resistance for Voltmeter and Low resistance for ammeter. Leave a Reply Cancel reply Your email address will not be published.

GEODYNA 980L PDF

Ballistic galvanometer

A ballistic galvanometer is a type of sensitive galvanometer ; commonly a mirror galvanometer. Unlike a current-measuring galvanometer, the moving part has a large moment of inertia , thus giving it a long oscillation period. It is really an integrator measuring the quantity of charge discharged through it. It can be either of the moving coil or moving magnet type. Before first use the ballistic constant of the galvanometer must be determined.

A HORA DOS RUMINANTES PDF

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. The potentiometer is based on the premise that the current sustaining coil is kept between the magnetic field experiences a torque. The moving coil, suspension, and permanent magnet are the main parts of the galvanometer. It is rectangular or circular and has the number of turns of fine copper wire. The coil is freely moved about its vertical axis of symmetry between the poles of a permanent magnet.

BROAN L200 PDF

The ballistic galvanometer

Definition: The galvanometer which is used for estimating the quantity of charge flow through it is called the ballistic galvanometer. The working principle of the ballistic galvanometer is very simple. It depends on the deflection of the coil which is directly proportional to the charge passes through it. The galvanometer measures the majority of the charge passes through it in spite of current. The ballistic galvanometer consists coil of copper wire which is wound on the non-conducting frame of the galvanometer.

LOS PECADOS DE LA FAMILIA MONTEJO PDF

FREELY ELECTRONS

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy. See our Privacy Policy and User Agreement for details.

Related Articles