What is the aim of the tangent galvanometer experiment?

The tangent galvanometer was originally designed to measure an unknown current by comparing the magnetic field produced by that current with the earth’s magnetic field.

How do you measure tangent galvanometer?

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. Tangent galvanometer is used to measure steady currents.

What is tangent galvanometer explain in detail?

: 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.

How can the Earth’s magnetic field be used using a tangent galvanometer?

(4), m=(μ0*2πN)/(4πRH) Then, H=7.6867 x 10-8T Result The value of earth’s magnetic field by using a tangent galvanometer is H=7.6867 x 10-8T Precautions 1. The battery should be freshly charged. 2. The magnetic needle should swing freely in the horizontal plane.

How do you calculate tan theta in a tangent galvanometer?

According to Tangent law B = B H tan ⁡ or μ 0 n I 2 a = B H tan ⁡ Or I = 2 a n μ 0 B H tan ⁡ θ = B H G 1 tan ⁡ θ = K tan ⁡ where G 1 = n μ 0 2 a is galvanometer constant and K = B H G 1 K = B H G 1 If θ = 45 ∘ then  = K, so reduction factor of a tangent galvanometer is numerically equal to the current in ampere …

What are the main parts of tangent galvanometer?

The coil consists of an insulated copper wire wound on a vertical circular frame. The frame is made up of nonmagnetic material like ebonite. The frame is fixed vertically on a horizontal base with leveling screws. The coil is provided with two or more coils of a different number of turns.

What is tangent galvanometer Class 12?

Tangent galvanometer is an instrument for measuring small electric currents. With it one can measure the horizontal component of Earth’s magnetic field also. It consists of a coil of insulated copper wire wound on a circular non-magnetic frame.

Can a galvanometer measure AC current?

No, we cannot use galvanometer to measure alternating current because in AC, the direction of current keeps changing frequently, and so pointer will not be able to deflect.

What is tangent law in tangent galvanometer?

Tangent galvanometer : Tangent galvanometer is a device used for measuring current. It works on the principle of tangent law. A magnetic needle suspended at a point where there are two crossed fields at right angles to each other will come to rest in the direction of the resultant of the two fields.

What is dynamo effect class 12?

The magnetic field of the earth is thought to arise due to electrical currents produced by convective motion of metallic fluids (consisting mostly of molten iron & nickel) in the outer core of the earth. This effect is also known as the dynamo effect.

What is meant by tangent law?

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.

What is BH in tangent galvanometer?

Let BH be the horizontal component of the earth’s magnetic induction and B be the magnetic induction at the centre of the coil due to the current in the coil. The direction of B will be perpendicular to the plane of the coil and hence perpendicular to BH. By the tangent law.