Ravi Barwad, Author at Polytechnic Hub

LED Lighting comes with 16 million color

ADATA® Technology, a leading manufacturer of high-performance DRAM modules, NAND Flash products and LED lighting products launches its AURA RGB interior lighting bulb. The AURA RGB bulb displays over 16…

Ravi Barwad February 1, 2015

Electronics Articles

Difference between watts and volt amperes

Difference Watts Valt-amperes Abbreviation W VA Calculation For dc: Vdc X Idc For dc: Vdc X Idc Instrument need for measurement Wattmeter (a typical multimeter cannot measure watts unless the…

Ravi Barwad February 1, 2015

Electronics Articles

Dangers of Solar Storms

By Dr.S.S.Verma, Department of Physics, S.L.I.E.T., Longowal, Distt.-Sangrur (Punjab)-148 106 Sun is the primary driver of life on Earth and is equated like a GOD in mythologies all over the…

Ravi Barwad January 31, 2015

Electronics Articles

Stretchable substrates and Elastomeric materials

By Dr. S. S. VERMA, Department of Physics, S.L.I.E.T., Longowal, Distt.-Sangrur (Punjab)-148 106 E-mail: ssverma@fastmail.fm Electronic components historically have been flat and unbendable because silicon, the principal component of all electronics,…

Ravi Barwad January 31, 2015

Electrical Articles

Voltage comparator and Schmitt trigger

Following are the Difference between Voltage comparator and Schmitt trigger. Voltage Comparator Schmitt Trigger Voltage Comparator has only one reference voltage. It has two reference voltage utp and VLlt. The…

Ravi Barwad December 18, 2014

Electrical Articles

Types of induction motor

An Induction Motor is consist of two main parts which as follows – 1. Stator 2. Rotor The stationary frame called ‘stator’ and rotary part is called as ‘rotor’. The…

Ravi Barwad December 14, 2014

Electrical Articles

Difference squirrel cage rotor and wound or slip cage rotor

Squirrel cage rotor Wound or slip cage rotor This rotor is in the form of bars which are shorted at the end with the help of end rings. This rotor…

Ravi Barwad December 14, 2014

Electrical Articles

Comparison between core and shell type transformer

Core Type Transformer Shell type transformer The core has only one magnetic circuit. It has two magnetic circuits. Core has two limbs. Core has three limbs. It has less mechanical…

Ravi Barwad December 14, 2014

Electrical Articles

The brief concept of EMF (Electromotive Force)

EMF is short form of electromotive force. All the metals contain a large number of free electron which direction inside the metal piece. If battery or voltage source is connected…

Ravi Barwad December 14, 2014

Electronics Articles

What is the formation of PN-Junction?

A P-type and N-type semiconductor are joint together with a help of special fabrication techniques to form a PN-Junction. The terminals are brought out for external connection with P-type and…

Ravi Barwad December 14, 2014