Physics

Rotating coil in a magnetic field, induces an alternating emf and hence an alternating current. Since the emf induced in the coil varies in magnitude…

Working Process of transformer A transformer consists of primary and secondary coils insulated from each other, wound on a soft iron core. To minimise eddy…

Reduce Cost of Transmission For transmitting electric power at 11,000 W at 220 V the current capacity of line wires has to be 50 A…

Long distance power transmission The electric power generated in a power station situated in a remote place is transmitted to different regions for domestic and…

Although transformers are very competent devices, small energy losses do happen in them due to some reason. Causes Energy losses in a transformer: (1) Hysteresis…

Transformer is an electrical device used for converting low alternating voltage into high alternating voltage and vice versa. It transfers electric power from one circuit…

The efficiency of a transformer is defined as the ratio of output power to the input power. η = [output power / input power] =…

Working Process of AC Dynamo Whenever, there is a change in orientation of the coil, the magnetic flux linked with the coil changes, producing an…

The three-phase power is generally used for transmission and allocation of electrical power because of their advantage. This has properties that make it very advantageous…

Applications of Eddy current (i) Dead beat galvanometer When current is passed through a galvanometer, the coil oscillates about its mean position before it comes…