Solid state materials can be classified into three groups: insulators, semiconductors conductors.  Insulators have no free charge carriers available with … Read moreInsulators, Conductors and Semiconductors (with Band Diagram)

Swinburne’s test is the simplest indirect method of testing dc machines. In this method, the dc machine (generator or motor) … Read moreSwinburne’s Test of DC Machine (Generator and Motor)

There are several tests that are conducted for testing a dc machine (generator or motor) to judge its performance. The … Read moreTesting of DC Machines (DC Motor and DC Generator)

A transformer is a static piece of equipment used either for raising or lowering the voltage of an AC supply … Read moreWorking Principle of Transformer

Two types of noises occur in an electric motor, one is electrical noise and the other is mechanical noise. The … Read moreElectrical and Mechanical Noise in Motors

An electrical engineer is someone who designs and develops new electrical equipment, solves problems and tests equipment. They work with … Read moreWhat do Electrical Engineers Do?

What is Back EMF? When the armature of a DC motor rotates under the influence of the driving torque, the armature … Read moreBack EMF and Its Significance in DC Motor

An alternator operates on the same fundamental principle of electromagnetic induction as a DC generator i.e., when the flux linking a … Read more4 Advantages of Stationary Armature in Alternator