Skip to content

Polytechnic Hub

for Electronics, Electrical, Mechanical, Automobile & Textiles

  • Home
  • Electrical
    • Rectification
  • Electronics
  • PLC
  • Inspection
  • Contact Us
  • facebook.com
  • twitter.com
  • t.me
  • instagram.com
  • youtube.com
Subscribe
Top Stories
Is Duracell 245 the Same as 2CR5?
May 21, 2026
Can I Use Two Smaller Batteries Instead of One 4D Battery?
May 20, 2026
What is an Aluminum heat sink and what factors affect its quality?
August 11, 2021
Are There Any Benefits of Using Exam Dumps for Passing Microsoft 70-410 Test?
January 29, 2020
What is simple mechanisms
May 9, 2019
Theory of machine
May 9, 2019
Magnetic hysteresis
August 14, 2018
Magnetic leakage and fringing
August 13, 2018
Magnetic circuit
August 13, 2018
Electromagnetism
August 12, 2018
Magnetic flux(∅)
August 12, 2018
Superposition’s theorem
August 12, 2018
Difference between series circuit and parallel circuit
August 11, 2018
Kirchhoff’s laws
August 11, 2018
Source of electrical energy
August 11, 2018
What is ohm’s law ?
August 10, 2018
Voltage rise and voltage drop
August 10, 2018
Analog between hydraulic and electric circuits
August 10, 2018
Capacitance
August 9, 2018
Atomic structure
August 9, 2018
Tips To Pass Cisco CCNA 200-125 Routing & Switching Certification Exam
August 7, 2018
Functions of automatic star delta converter
July 17, 2018
What is a variable frequency drive?
July 17, 2018
What is smooth starter ?
July 10, 2018
Gas turbine cogeneration system
July 10, 2018
What is extraction condensing steam turbine
July 9, 2018
Bottoming cycle type of cogeneration
July 9, 2018
Topping cycle
July 6, 2018
What is P.F tariff ?
July 5, 2018
What is TOD tariff?
July 3, 2018
Energy audit schemes
July 3, 2018
Bill collection facility
July 1, 2018
Amorphous iron
July 1, 2018
Energy efficient transformer
June 30, 2018
Compensating reactive power flow
June 30, 2018
Transmission and distributions losses in maharashtra
June 30, 2018
What is cast resign ?
June 29, 2018
What is flexibility
June 29, 2018
Measurement of electrical
June 29, 2018
Effect of voltage unbalances parameter
June 28, 2018
Types of motor enclosure
June 28, 2018
What is gear driver ?
June 28, 2018
What are core lamination
June 27, 2018
Isolating transformer
June 27, 2018
What is belt drives
June 27, 2018
What is changing to a different winding
June 26, 2018
What is copy rewinding
June 26, 2018
Types of re-lamping
June 26, 2018
Current balancing procedure
June 15, 2018
Meter inaccuracies
June 15, 2018
What is power theft?
June 15, 2018
What is copper losses
June 14, 2018
What are copper losses by conductor
June 14, 2018
Metal halide lamps
June 14, 2018
Compare positive feedback and negative feedback
June 13, 2018
What is transposition
June 13, 2018
Eight major equipment in the substation
June 13, 2018
Classification of amplifiers according
June 13, 2018
Methods of coupling
June 13, 2018
Necessity of coupling
June 13, 2018
What is an indicator?
June 12, 2018
Application of astable multivibrator
June 12, 2018
Explain the frequency stability of an oscillator
June 12, 2018
Differentiate between single-walled carbon nano-tube and multi-walled carbon nano-tube
June 12, 2018
Difference between feeder and distributer
June 12, 2018
Comparison of A.C distribution with D.C distribution
June 12, 2018
Frequency stability of an oscillator
June 11, 2018
What is positive feedback
June 11, 2018
Classification of oscillators
June 11, 2018
Explain barkhausens criteria for oscillation
June 11, 2018
Applications of nano-materials
June 11, 2018
Construction of gas pressure cable
June 11, 2018
Basic principles of solution
June 11, 2018
What are liquid crystal polymers?
June 11, 2018
How composite materials are used as industrial materials?
June 11, 2018
How are LSP classified?
June 11, 2018
What are biodegradable polymers?
June 10, 2018
How is conducting polymers classified?
June 10, 2018
Properties of conducting polymers
June 10, 2018
What are the functions of a lubricant?
June 10, 2018
Difference between cloud point and pour point
June 10, 2018
What is steam emulsification number
June 10, 2018
Significance of saponification value
June 10, 2018
What is cloud point and pour point
June 10, 2018
Determination and significance of acid value
June 10, 2018
How is viscosity index calculated for unknown oil?
June 10, 2018
Method of determination
June 9, 2018
What are viscosity and viscosity index
June 9, 2018
Significance of relative viscosity at different temperature
June 9, 2018
Properties of bio-degradable lubricants
June 9, 2018
What are bio-degradable lubricants?
June 9, 2018
What is viscosity and viscosity index
June 9, 2018
Applications of bio-degradable lubricants
June 9, 2018
Advantages and disadvantages bio-degradable lubricants
June 9, 2018
Distinguish between flash point and fire point
June 9, 2018
What is consistency and drop of grease
June 9, 2018
Dc machine
June 8, 2018
What is lubricating emulsion
June 8, 2018
Blended oils
June 8, 2018
Petroleum lubricating oil
June 8, 2018
Posted inElectronics Articles

Is Duracell 245 the Same as 2CR5?

In the case of specialty batteries, such an occurrence is not a rarity to experience in the quantity of similar-sounding products. The Duracell 245 and the 2CR5, two naming systems…
Continue Reading
Posted by Technical Editor May 21, 2026
Posted inElectronics Articles

Can I Use Two Smaller Batteries Instead of One 4D Battery?

The 4D battery is commonly used in heavy-duty cars, boats, Alma vehicles, and factory tools, as well as in the industrial environment. It is, however, bulky, heavy, and costly, thus…
Continue Reading
Posted by Technical Editor May 20, 2026
Posted inElectronics Articles

What is an Aluminum heat sink and what factors affect its quality?

There are different metals with different properties, some metals are used for luxury purposes such as diamond and gold, others are used for building purposes such as brass, nickel, steel,…
Continue Reading
Posted by Technical Editor August 11, 2021
Posted inInformation

Are There Any Benefits of Using Exam Dumps for Passing Microsoft 70-410 Test?

In its exam policy, Microsoft specifies that the candidates for itstests should not use braindumps. But still, most people prefer them as their primary preparation tool for the reason that…
Continue Reading
Posted by Technical Editor January 29, 2020
Posted inMechanical Articles

What is simple mechanisms

Introduction A machine is a device which receives energy and transforms it into some useful work. A machine consists of a number of parts or bodies. The mechanisms of the…
Continue Reading
Posted by Technical Editor May 9, 2019
Posted inMechanical Articles

Theory of machine

Definition The subject Theory of Machines may be defined as that branch of Engineering-science, which deals with the study of relative motion between the various parts of a machine, and forces…
Continue Reading
Posted by Technical Editor May 9, 2019
Transformer phasor diagram
Posted inElectrical 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…
Posted by Ravi Barwad October 26, 2014
Ideal transformer
Posted inElectrical 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,…
Posted by Ravi Barwad October 26, 2014
Friction force diagram
Posted inMechanical Articles

Laws of Friction

Coulomb in 1781 conducted several experiment on t he friction of plane on dry surface. On the basis of his experiments he stated some laws of friction which as follows…
Posted by Technical Editor October 21, 2014
Posted inElectrical Articles

Difference between drift current and diffusion current

Drift current Diffusion current Under the action of electric field the charge carriers in the semiconductor material stops moving randomly and start drifting towards or away the applied electric field…
Posted by Ravi Barwad October 21, 2014
Metal flat bar
Posted inMechanical Articles

Why holes are not generated in metals

Vacancy of electron created in the valance band of solid due to the upward transition of electron is called hole. In case of semiconductor valance and conduction bands are separated…
Posted by Technical Editor October 20, 2014
Friction force diagram
Posted inMechanical Articles

Force of friction and their types

Friction is the property of two surfaces is contact by virtue of which each surface resists the relative motion of the other surface. Thus when a body moves or tends…
Posted by Technical Editor October 20, 2014
Laser Light Beam
Posted inElectronics Articles

Laser light and ordinary light difference

Laser light Ordinary light It is highly coherent. It is incoherent in nature. There coherence length as of the order of few km (Kilometer). There coherence length as of the…
Posted by Nikhil Kumar October 20, 2014
Working of Optical fiber
Posted inElectronics Articles

Working of optical fiber

An optical fiber consists of a very thin transparent fiber designed to guide light wave along this length. It works on the principle of total internal reflection. When light enters…
Posted by Nikhil Kumar October 18, 2014
Posted inElectronics Articles

Difference between Polarized light and Unpolarized light

Polarized light Unpolarized light The oscillation is confined to only one plane. The oscillation occur in many plane It is absolutely coherent in nature. It is incoherent in nature. Its…
Posted by Nikhil Kumar October 18, 2014
Posted inMechanical Articles

Losses in steam turbines

What are the steam turbines losses? Frictional loss in nozzle Sudden expansion loss Frictional loss in bearing Frictional loss in moving blade Steam level with same K.E. called as carry…
Posted by Technical Editor October 17, 2014

Posts pagination

Previous page 1 … 86 87 88 89 90 … 92 Next page
You May Have Missed
Posted inElectronics Articles

Is Duracell 245 the Same as 2CR5?

Posted by Technical Editor May 21, 2026
Posted inElectronics Articles

Can I Use Two Smaller Batteries Instead of One 4D Battery?

Posted by Technical Editor May 20, 2026
Posted inElectronics Articles

What is an Aluminum heat sink and what factors affect its quality?

Posted by Technical Editor August 11, 2021
Posted inInformation

Are There Any Benefits of Using Exam Dumps for Passing Microsoft 70-410 Test?

Posted by Technical Editor January 29, 2020
Copyright 2026 — Polytechnic Hub. All rights reserved. Bloghash WordPress Theme
Scroll to Top