Ravi Barwad, Author at Polytechnic Hub

Difference between conductor, insulator and semiconductor

Conductor Insulator Semiconductor The conductivity of conductor is very high. The conductivity of insulator is very low. The conductivity of semiconductor is moderate. It has very low resistivity. It has…

Ravi Barwad December 14, 2014

Electrical Articles

Difference RC phase shift oscillator & Wein bridge oscillator

RC phase shift oscillator Wein bridge oscillator This oscillator is used for low frequency range. This oscillator is used for low frequency range since both are RC oscillator. Feedback network…

Ravi Barwad December 2, 2014

Electrical Articles

Basic Electrical Theorems and Circuits Analysis Laws

Law Definition Relationship Ohm's Law modified for AC circuits with sinusoidal signals U'=ZxI', where U' & I' -voltage and current phasors, Z-complex impedance (u=Rxi) Lorentz force law, Faraday's law and…

Ravi Barwad November 14, 2014

Electronics Articles

Application of IC 741

IC 741 is used in Amplifier. It is used in active filter. It is used in Arithmetic circuit. IC 741 is used in log and antilog amplifier. It is used…

Ravi Barwad October 30, 2014

Electronics Articles

Pin diagram of IC 741

IC 741 Operational Amplifier (Op-amp) The operation amplifier (Op-amp) is basically voltage amplifier with extremely high voltage gain. Pin Diagram Symbol of IC 741 The Op–amp IC 741 has two…

Ravi Barwad October 30, 2014

Electrical Articles

Advantages of rotating field and stationary armature system

In this case of high voltage generation, the instruction problem is server. If the armature is rotating, this is due to centrifugal states develop in the body due to the…

Ravi Barwad October 27, 2014

Electrical Articles

Working principle of Alternator

The work on the principle of Faraday's law of electromagnetic induction whenever the conductor cuts the magnetic flux and emf in induced in it. This emf is dimensionally induced emf.…

Ravi Barwad October 27, 2014

Electrical Articles

Double Cage Induction Motor

In case of 3Ø squirrel cage motor has low starting torque. This is due to the low Rotor Resistance. Then, the starting torque with increase but at the same time…

Ravi Barwad October 27, 2014

Electrical Articles

How does a transformer work

Ideal Transformer Idea transformer is nothing but a transformer which has 100% efficiency. In this transformer there are two purely inductive coils. So this is no iron loss, no copper…

Ravi Barwad October 26, 2014

Electrical Articles

Difference between Ideal transformer and practical transformer

Concept of Ideal Transformer Idea transformer is nothing but a transformer which has 100% efficiency. In this transformer there are two purely inductive coils. So this is no iron loss,…

Ravi Barwad October 26, 2014