What is tangent law in tangent galvanometer?
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 the tangent law in 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.
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.
Which type of magnetic field is used in tangent galvanometer?
In a tangent galvanometer, the magnetic induction produced by the coil of wire situated in the magnetic meridian is found to be equal to the horizontal component of the earths magnetic field.
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.
Why tangent galvanometer is called 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. Due to this characteristic of the galvanometer is known as the tangent galvanometer.
What is tangent law formula?
a + b = k (sin A + sin B)
How is tan theta related to magnetic field?
This is called Tangent law If a compass or other magnet is subjected to a magnetic field B that is perpendicular to the horizontal magnetic field of the Earth (Bh), it will rest at an angle theta to the Earth’s magnetic field. The relationship between the two magnetic fields is: B = Bh(tan theta).
How do you measure the Earth’s magnetic field using a tangent galvanometer?
When the wire loops of the tangent galvanometer are aligned with the magnetic field direction of the Earth, and a current is sent through the wire loops, then the compass needle will align with the vector sum of the field of the Earth and the induced field as shown in Figure 1.
What is the working principle of a 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.
What is the function of tangent galvanometer?
Tangent galvanometer. A tangent galvanometer is an early measuring instrument used for the measurement of electric current. It works by using a compass needle to compare a magnetic field generated by the unknown current to the magnetic field of the Earth.
What is tan rule used for?
Tangent (tan) function – Trigonometry. (See also Tangent to a circle). In a right triangle, the tangent of an angle is the length of the opposite side divided by the length of the adjacent side. Try this Drag any vertex of the triangle and see how the tangent of A and C are calculated.
How to calculate magnetic field for tangent galvanometer?
Here is how the Magnetic Field for Tangent Galvanometer calculation can be explained with given input values -> 0.000807 = ( [Permeability-vacuum]*2*1)/ (2*10*tan (1)). What is Magnetic Field for Tangent Galvanometer?
What is the sensitivity of 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. Keeping the value of cos²θ small, i.e. deflection should be small,
What is tangent law of magnetism?
This is known as tangent law of magnetism. 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.
How to determine the reduction factor of tangent galvanometer?
To determine the reduction factor of T.G: Note: Take deflection between 30 and 60 degrees. Reduction factor K of the tangent galvanometer can be detremined. The reduction factor of the given tangent galvanometer, K =…………A We were unable to load Disqus Recommendations.