reduction factor is used to find earth's magnetic field and compare galvanometer constants
The galvanometer constant is the factor that relates the deflection of a galvanometer to the current passing through it. It is usually given as the current required to produce a unit deflection (such as one full-scale deflection) on the galvanometer. To find the galvanometer constant, you can pass a known current through the galvanometer and measure the corresponding deflection, then calculate the constant as the current divided by the deflection.
You find the tangent to the curve at the point of interest and then find the slope of the tangent.
A tangent refers to the way in which a curve is measured. The amount of deviation from the segment line is measures, then a formula applied to find the tangent.
We can find it by using wheatstone bridge.
a tangent is a line that touches the circle at only ONE point
budosnp
You need more than one tangent to find the equation of a parabola.
In order to find the equation of a tangent line you must take the derivative of the original equation and then find the points that it passes through.
Sine = -0.5 Cosine = -0.866 Tangent = 0.577
1/(tangent of angle)
Take the inverse tangent -- tan-1(opposite side/adjacent side)