## Matrices EAMCET – Part 1

Here are some of the most important points from matrices to be understood and remembered by EAMCET aspirants. Product of two upper triangular matrices is a upper triangular matrix. Determinant of triangular matrix is the product of the elements in the principle diagonal. (i) trace (KA) = K tr(A)(ii) tr (A + B) = tr(A) …

## Some Important Determinants to be Remembered

## Measuring Low Resistance Using Kelvin Double Bridge

We aim to measure the resistance of a given resistor using Kelvin Double Bridge and determine its tolerance. Kelvin Double Bridge is nothing but a modification of Wheatstone bridge. It is used for measuring of low resistance to a good precision. It compares two ratio arms P,Q and p,q and hence is called ‘double bridge’. …

## How to Measure 3-Phase Reactive Power of a Induction Motor Using Single Wattmeter

Here we aim to measure the three phase reactive power ‘Q’ absorbed by the given 3Φ induction motor by using single wattmeter. The formula for the reactive power ‘Q’ absorbed by “Balanced Load” is given by where, Q = Total reactive power absorbed VL = Line voltage of supply Vph = Voltage per phase of …

## How to Find the Value of Self-Inductance and its Inherent Resistance of a Given Coil Using Anderson Bridge

Anderson Bridge:- The Bridge is used to measure the self-inductance of a coil in terms of standard known capacitor. The bridge and its connection diagrams are as shown below: Anderson Bridge Connection Diagram The first figure shows the Anderson Bridge circuit diagram and second figure shows the connections to be made in the kit. It …