PMMC
PMMC Instrument || Construction & Working || Advantages & Disadvantages

PMMC A permanent magnet moving coil instrument can measure DC voltage & current. The working principle of these instrument is the same as that of the D' Arsonval type of…

Bipolar Junction Transistor (BJT)
Bipolar Junction Transistor (BJT)

Bipolar Junction Transistor A bipolar junction transistor is a three terminal semiconductor device consists of two P-N junctions which are able to amplify a signal. It is a current controlled…

Explain Construction and Working of Autotransformer
Explain Construction and Working of Autotransformer

Autotransformer An autotransformer is a type of electrical transformer with only one winding. In an autotransformer, one single winding is used as primary winding as well as secondary winding. In…