by Dipali Chaudhari
What is the difference between npn and pnp transistors? Explained- basic concepts, symbol, use, working role, function. Also described the similarities of PNP and NPN transistors.
What is a pantograph? Types of pantograph based on construction, power source, frame, operation, spring. What are the single arm and double arm pantographs?
What are the best solar panels for home? Explained with basic concepts of solar panel, Types, Advantages, Disadvantages, Applications and Solar panel manufacturers in India.
Newton’s second law of motion explained with an example. Also described the relation between the force, mass and acceleration by using online calculator.
What is causes of proximity effect in transmission line? Explained definition, example, affecting factors, and MCQ quiz on proximity effect.
What is a skin effect in transmission line? Explained it with definition, diagram, formula, calculation of skin depth (δ), factors affecting on this effect,. Online MCQ quiz on skin effect.
Gravity based foundation (i.e. side gravity, pure gravity, and new pure gravity foundations) explained with their dimension for railway construction.
What are the types of foundations in railway electrification? Explained side bearing (B) foundation and rolled steel joist (RSJ) with their dimension and marking procedure.
What are the stages involved in Railway line survey? Survey for construction of new railway line in India.
What is difference between electric and diesel locomotives? Main parts of electric & diesel trains. Advantages & Disadvantages of electric engine over diesel-electric engine.