tangent galvanometer in British English noun. a type of galvanometer having a vertical coil of wire with a horizontal magnetic needle at its centre. The current to be measured is passed through the coil and produces a proportional magnetic field which deflects the needle.

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## What is tangent galvanometer Class 12?

Hint: A tangent galvanometer is an initial measuring device used to measure electric current. It works by using a compass needle to compare the magnetic field generated by an unknown current to the Earth’s magnetic field.

## Why is 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.

## What is the formula of tangent galvanometer?

A tangent galvanometer will be sensitive if it gives a large deflection for a fractional change in current. Now we can use the formula $ I = K\tan \theta $ to find the deflection $ d\theta $ and find the condition which gives the maximum deflection. $ n = $ the number of turns of the coil inside the galvanometer.

## Where is tangent galvanometer used?

Tangent galvanometer is used to measure steady currents.

## What is tangent law in physics?

Tangent Law states that when a bar magnet is left suspended in the influence of a magnetic field B at right angle with the Earth’s Magnetic Field’s Horizontal Component B H , it comes to rest at an angle θ such that tan θ = B B H .

## What is galvanometer measure?

galvanometer, instrument for measuring a small electrical current or a function of the current by deflection of a moving coil. The deflection is a mechanical rotation derived from forces resulting from the current.

## Is tangent galvanometer and moving coil galvanometer the same?

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 Rayleigh current balance?

[′rā·lē ‚bal·əns] (electromagnetism) An apparatus for assigning the value of the ampere in which the force exerted on a movable circular coil by larger circular coils above and below, but coaxial with, the movable coil is compared with the gravitational force on a known mass.

## What are the 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.

## Why the tangent galvanometer is set into magnetic meridian?

Solution : Tangent galvanometer works on the principle of tangent law . For tangent law , both field should be perpendicular to each other .

Thus, when tangent galvanometer is set in magnetic meridian then field due to current carrying coil is perpendicular to horizontal component of earth’s field.

## What is reduction factor of tangent galvanometer?

The reduction factor of tangent galvanometer is. K=GBH=BH×nμ02r Thus reduction factor of a tangent galvanometer depends upon the geometry of its coil.

## What is the unit of galvanometer constant?

The SI unit of current sensitivity of galvanometer is division/ampere (or) radian/ampere.

## When a current is passed through a tangent galvanometer?

A tangent galvanometer shows no deflection when a current is passed through it.

## What is tangent law and reduction factor of tangent galvanometer?

From tangent law we have B=BHtanθ, B is the second magnetic field created by the flow of current(I), which is given by B=2rμ0nI. The reduction factor, K=tanθI, therefore K=pn1 where p is a constant.

## What are the Application of galvanometer?

Applications of galvanometer: We can quickly determine the voltage between two points when we use this device. These devices are used in control systems, laser engraving, laser TVs, laser sintering, and displays. Galvanometers are also used in CD/DVD players and in hard drives to control the position of head servos.

## Does galvanometer measure voltage?

A galvanometer can be made into a voltmeter to measure voltage by connecting a high resistance in series. Once the galvanometer is converted into a voltmeter it should be connected parallel to the circuit just like a voltmeter. Was this answer helpful?

## What is the difference between ammeter and galvanometer?

The major significant difference between an ammeter and a galvanometer is that ammeter shows only the magnitude of the current. On the other hand, the galvanometer shows both the direction and magnitude of the current.

## What is tangent law of magnetic field?

Tangent law states that, if a magnetic field ′B′ is applied at right angles to the horizontal component of the earth’s field BH, the needle comes to equilibrium at an angle ′θ′ to the magnetic meridian such that, tanθ=BB.

## Is there a law of tangent?

The laws of tangent (Law of Tan) describes the relation between difference and sum of sides of a right triangle and tangents of half of the difference and sum of corresponding angles. It represents the relationship between the tangent of two angles of a triangle and the length of the opposite sides.

## Why is magnetic field tangent?

Inside the magnet, the magnetic field lines start from the south pole and end on the north pole. The tangent to the magnetic field line at a given point represents the direction of the net magnetic field B at that point.

## Who discovered galvanometer?

The earliest form of the electromagnetic galvanometer was devised in 1820 by Johann Schweigger (1779–1857) at the University of Halle in Germany.

## Why galvanometer is used in electric circuit?

Hence, the function of a Galvanometer in a circuit is to detect the existence of electric current in a circuit.

## What is the difference between galvanometer and tangent galvanometer?

Unlike the moving coil galvanometer, the tangent galvanometer has a non-linear scale. A tangent galvanometer is affected by the external magnetic field, which is not the case with a moving coil galvanometer. Unlike the moving coil galvanometer, a tangent galvanometer is set to be a magnetic meridian.

## What is the working principle of galvanometer?

A moving coil galvanometer works on the principle that a current-carrying coil placed in a magnetic field, experiences a torque. The coil springs along with the radial field ensure the deflection to be proportional to the strength of the current. Created by Mahesh Shenoy.