What is meant by tangent law?

What is meant by tangent law?

Hint: Tangent law is used to determine the strength of two perpendicular magnetic fields. This law is called tangent law because of the tangent factor in the expression. A torque will act on a magnet when it is placed in a magnetic field.

What is the tangent law formula?

You can use the law of tangents to solve for the measures of missing parts of a triangle when you have two sides of a triangle and the angle between them (referred to as SAS, or side-angle-side, in trigonometry). The sum of angles A and B equals 180 degrees minus the measure of angle C: A + B = 180 – 80 = 100.

What is tangent law of 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 sine law cosine and tangent law?

The law of tangents states that. The law of tangents, although not as commonly known as the law of sines or the law of cosines, is equivalent to the law of sines, and can be used in any case where two sides and the included angle, or two angles and a side, are known.

What is tan a position?

The magnetic field at a point along the axial line of a bar magnet is perpendicular to the horizontal component of Earth? If a magnetometer and a bar magnet are placed in such way that this condition is satisfied, then this arrangement is called Tan A position.

What does tangent solve for?

We can use tangent to find the length of the side of a right triangle that is adjacent to an acute angle with a known measure as long as we know the measure of the side opposite that angle. We can also use it to find the opposite side if we know the adjacent side and the angle in question.

When can tangent be used?

Tangent is usually shortened to tan but is pronounced tangent. This function can be used to determine the length of a side of a triangle when given at least one side of the triangle and one of the acute angles.

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 the use of commutator in tangent galvanometer?

The commutator can reverse the current through the T.G coil without changing the current in the rest of the circuit. Taking the average of the resulting two readings for deflection averages out, any small error in positioning the TG coil relative to the earth’s magnetic field Bh .

Why is there no tangent law?

Why don’t we use the tangent rule? We don’t use the tangent rule for two reasons: one, it’s more complicated than the sine and cosine rules; and two, you can use the sine and cosine rules to do the same thing either more simply, or without much more work.

What is cosine law used for?

The Law of Cosines is used to find the remaining parts of an oblique (non-right) triangle when either the lengths of two sides and the measure of the included angle is known (SAS) or the lengths of the three sides (SSS) are known.

What is the tangent rule?

There is one, slightly sneaky case where the tangent rule is useful: in the classic cosine rule set-up (you know two sides, $a$ and $b$, and the angle between them, $C$), you can work out the other angles – it takes a bit of work, but it’s probably less work than finding out the missing side with the cosine rule and then the angles with the sine

What is tangent law of magnetism?

Expert Answers. The tangent law of magnetism is a way to compare the strengths of two magnetic fields that are perpendicular to each other. 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.

What is the mathematical definition of tangent?

In geometry, a tangent is a straight line that touches a curve at one point. At the place where they touch, the line and the curve both have the same slope (they are both “going in the same direction”). For this reason, a tangent line is a good approximation of the curve near that point.