Polytechnic Hub - Page 90 of 92 - for Electronics, Electrical, Mechanical, Automobile & Textiles

Difference between BJT And JFET

BJT JFET Unipolar device (current conduction is only due to one type of majority carrier either electron or hole). Bipolar device (current condition, by both types of carriers, i.e. majority…

Ravi Barwad September 25, 2014

Electrical Articles

Types of Transformers Based on the Value of K

Transformation Ratio (K) The transformation ratio for voltage is defined as the ratio of secondary voltage to the primary voltage of a transformer. It is denoted by K. Turns Ratio…

Ravi Barwad August 18, 2014

Electrical Articles

Working of Static Relay

The primary of C.T. is connected to transmission line and secondary is connected to some filter circuit. This filtered signal is given to rectifier where it is converted from…

Ravi Barwad August 14, 2014

Electrical Articles

Microprocessor Based Overcurrent Relay

Current is taken from C.T. and given to I to V converter because many electronics circuit require voltage signal for operation. The A.C. voltage is converted into D.C. voltage by…

Ravi Barwad August 14, 2014

Electrical Articles

Difference between static relays and electromagnetic relays

Points Static Relays Electromagnetic Relays Power consumption Very less 1 milliwatt High 2 watt Moving contacts No moving contacts. So, No problem of Arcing No needs to replace contacts. Moving…

Ravi Barwad August 14, 2014

Electrical Articles

Problems of circuit interruption

Following are the problems that occur when circuit breaker is clearing fault or CB starts operating 1.Rate of Rise of Restriking voltage (R.R.R.V.) Unit of R.R.R.V. is KV/Hsec Every line…

Ravi Barwad August 14, 2014

Electrical Articles

Block diagram of remote control system

Functions of each block of remote control system Remote control centre equipment consists Control panel with mimic diagram and control desk. Remote control switching equipments. FMVFT (Frequency modulated voice frequency…

Ravi Barwad August 12, 2014

Information Polytechnic Colleges List

Uttar Pradesh Polytechnic Colleges List

Agra Balwant Rural Engineering Institute, Bichpuri, Agra, Uttar Pradesh C.V.S College of Polytechnic, Agra Dev Institute of Technical Education, Agra Dr. B.R. Ambedkar Polytechnic Prembagh, Gwaliar Road, Agra Gaytri College…

Technical Editor August 11, 2014

Electrical Articles

What is Capacitance?

Capacitance of capacitor A capacitor is a passive electronic component that stores energy in the form of an electrostatic field. In its simplest form, a capacitor consists of two conducting…

Ravi Barwad August 10, 2014

Electrical Articles

What is difference between MCB and MCCB

What is the difference between MCB & MCCB, Where it can be used? MCB stand for Miniature Circuit Breaker MCCB stand for Moulded Case Circuit Breaker MCB is miniature circuit…

Ravi Barwad August 10, 2014