Polytechnic Hub - for Electronics, Electrical, Mechanical, Automobile & Textiles

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…

Technical Editor May 21, 2026

Electronics 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…

Technical Editor May 20, 2026

Electronics 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,…

Technical Editor August 11, 2021

Information

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…

Technical Editor January 29, 2020

Mechanical 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…

Technical Editor May 9, 2019

Mechanical 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…

Technical Editor May 9, 2019

Electrical Articles

Magnetic hysteresis

When the coil current ‘i’ rise from zero in positive directions a B-H curve ‘oa’ is obtained. where Bm is the maximum flux density reached point ‘a ’ due to…

Technical Editor August 14, 2018

Electrical Articles

Magnetic leakage and fringing

Total Flux (∅T): If a current is passed through the N turns of the exciting coil wound on the magnetic core having an air-gap. A total flux ∅T produces inside…

Technical Editor August 13, 2018

Electrical Articles

Magnetic circuit

A magnetic circuit may be considered as path followed by the magnetic flux. A rectangular core of magnetic material is wounded with N turn of a coil carrying a current…

Technical Editor August 13, 2018

Electrical Articles

A current carrying conductor or coil produces a magnetic flux or field. Thus electricity is always associated with magnetism. This is known as electromagnetism. The magnetic effect of electric current…

Technical Editor August 12, 2018