What are the different types of galvanometer?
Some of the different types of galvanometer include Tangent galvanometer, Astatic galvanometer, Mirror galvanometer and Ballistic galvanometer. However, today the main type of galvanometer type that is used widely is the D’Arsonval/Weston type or the moving coil type.
What is tangential galvanometer?
: a galvanometer consisting of a very small magnetic needle in the center of a large vertical circular coil of wire through which electric current is passed and whose plane is in the magnetic meridian with the intensity of the current being proportional to the tangent of the angle of deflection of the needle.
What is Stewart and Gee type galvanometer?
Determination of Magnetic Field along the Axis of a Current-Carrying Circular Coil. The angle which you measure by the Deflection Magnetometer is with reference to the earth’s magnetic field component or the magnetic field produced by current-carrying coil?
Why it is called tangent galvanometer?
Tangent galvanometer. It gets its name from its operating principle, the tangent law of magnetism, which states that the tangent of the angle a compass needle makes is proportional to the ratio of the strengths of the two perpendicular magnetic fields.
What is the difference between tangent galvanometer and simple galvanometer?
The tangent galvanometer is less sensitive than moving coil galvanometer. It has non linear scale. It is affected by external magnetic field. It is set to be magnetic meridian.
What is the difference between ammeter and galvanometer?
The major significant difference between ammeter and galvanometer is that ammeter shows only the magnitude of the current. Whereas, the galvanometer shows both the direction and magnitude of the current.
What is Astatic galvanometer?
Definition of astatic galvanometer : a galvanometer having two needles with opposite polarities that reduce the effect of the earth’s magnetism.
What is deflection magnetometer?
Deflection magnetometer is an instrument used to measure the magnetic moment and polar strength of a bar magnet. It is also used to compare the pole strengths of two bar magnet.
What is Stewart and Gee’s apparatus?
₹ 4,200 Get Latest Price. It consists of a circular frame made from non- magnetic silver aluminum alloy. An insulating copper wire is. wound on the frame. The ends of the wires are connected to the terminals which are fitted on the superior quality.
What is the relation between Gauss and Tesla?
One gauss corresponds to 10-4 tesla (T), the International System Unit. The gauss is equal to 1 maxwell per square centimetre, or 10−4 weber per square metre. Magnets are rated in gauss.
What is the sensitivity of a tangent galvanometer?
The sensitivity of the tangent galvanometer is defined as the ratio of the change in deflection of the galvanometer to the current producing this deflection. A galvanometer is said to be sensitive if it gives larger deflection for a small current. Decreasing the radius (r) of the coil.
What is tangent law in tangent galvanometer?
When a magnetic needle or magnet is freely suspended in two mutually perpendicular uniform magnetic fields, it will come to rest in the direction of the resultant of the two fields.
What kind of instrument is a tangent galvanometer?
Tangent galvanometer is an early measuring instrument for small electric currents. It consists of a coil of insulated copper wire wound on a circular non-magnetic frame. Its working is based on the principle of the tangent law of magnetism.
How is the current in a galvanometer determined?
Thus in a tangent galvanometer, the current through the coil is directly proportional to the tangent of the angle of deflection of the needle. Due to this characteristic of the galvanometer is known as the tangent galvanometer. Knowing k and θ we can calculate the value of the current through the coil.
What is the reduction factor of a tangent galvanometer?
The magnetic induction at the centre of the coil due to current in the coil is given by Where k is a constant, called the reduction factor of the tangent galvanometer. Thus in a tangent galvanometer, the current through the coil is directly proportional to the tangent of the angle of deflection of the needle.
What is the sensitivity of a moving coil galvanometer?
The general definition of the sensitivity experienced by a moving coil galvanometer is given as the ratio of change in deflection of the galvanometer to the change in current in the coil. The sensitivity of a galvanometer is higher if the instrument shows larger deflection for a small value of current.