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In this article, we are going to explore a way to convert the JSON text into a JavaScript object. JSON, also known as JavaScript Object Notation, is a lightweight data-interchange format that is used for exchanging data over web browsers. JSON is derived from the JavaScript programming language but can be used by various other languages also including Python, Java, PHP, Ruby, etc. It is also language-dependent.A JSON mainly follows a key-value data format that saves a value associated with a key. A JSON object consists of curly braces ({}) at both ends to define the starting and ending of ... Read More
Life of students is a wholesome mix of intense hardship and occasional leisure. Talk about ‘exams’ and it is not hard to visualize the tormenting state that students of this generation are experiencing. The reason for such an experience is not unfound. To put in simple terms, the reason is ‘toughness.’ To get into top notch educational institutions and reputed universities, students need to crack the entrance exams.This article will throw some light on some of the toughest entrance exams in India.UPSC – Union Public Service CommissionUPSC is the administering body that conducts this examination in various tiers. The fact ... Read More
There are several uses of Bootstrap as a framework since it offers design templates based on HTML and CSS technology covering the structure of a webpage and its visual and aural layout for various devices. Bootstrap also supports plugins for JavaScript and its design templates include variables like navigation, typography, tables, image carousels, buttons, forms, models and many more.For Creating LayoutsToday, most developers prefer Bootstrap for creating layouts because it has a highly responsive CSS that sets easily across both mobile devices as well as desktop and laptop computers. When it comes to browsers, Bootstrap adjusts seamlessly with most of ... Read More
The wicketkeeper changes his position after every over because the bowling and the batting ends are switched after every six balls. The act of switching the ends is done to keep the game fair. In addition, it also aims to minimize any advantage that players might get due to the following extraneous factors:Ground Dimensions-Certain boundaries of ground may be shorter or longer than the rest.Wind Direction-Wind blowing even in a slightly intense pace can help both; the batsman as well as the bowler.The Condition of the Pitch − Usually an innings of an ODI match consists of 50 overs, T20-20 ... Read More
An electric motor which is used to provide the primary rotational torque to a machine such as electric locomotives, elevators, conveyors, trolley buses and other electric vehicles etc. is described as a traction motor.General Features of Traction MotorsThe general features of the electric motors used for traction purpose are classified into two classes as −Mechanical FeaturesElectrical FeaturesMechanical Features of Traction MotorsThe mechanical features of electric motors used for traction applications are listed below −Robustness - A traction motor must be mechanically strong and robust so that it can be capable of withstanding severe mechanical vibrations.Small Size - The overall dimensions ... Read More
An electric traction system is the type of traction system that uses electrical energy for the movement of vehicle at any stage.The electric traction system is classified into two groups as −Self-contained vehicles or locomotives (Ex. – battery-electric drive and diesel-electric drive)Vehicles or locomotives which receive electric power from a distribution network or suitably placed substations (Ex. - railway electric locomotives, tramways and trolleybuses, etc.)Here, we described different types of electric traction systems along with their advantages and disadvantages −Straight Electric Traction SystemIn the straight electric traction system, either DC series motor or single phase AC series motor or three-phase ... Read More
There is no system of track electrification which is good in all aspects, i.e. it suffers from some disadvantage.The composite system (as the name implies) combines together any two of the systems of track electrification so as to incorporate good points of both the systems. The composite systems presently being used are as −Single-Phase AC to Three-Phase AC SystemSingle-Phase AC to DC SystemSingle-Phase AC to Three-Phase AC SystemThe single-phase to three-phase system of track electrification is also known as Kando System. As the three phase AC traction system has some disadvantages such as tapping of power supply through two overhead conductors ... Read More
What is Third Rail Traction System?A third rail is a method of providing electric power to an electric train through a semi-continuous rigid conductor placed along-side or between the running rails of a railway track.The third rail system uses an additional rail, called as conductor rail for supplying electrical power to the train. On most of the traction system, the conductor rail is placed on the sleeper ends outside the running rails, but in some cases a central conductor rail is used. The conductor rail is supported on ceramic insulators or insulated brackets, typically at intervals of 3 meters.The third ... Read More
A non-electric traction system is a type of traction system that does not use electrical energy for the movement of a vehicle at any stage.Types of Non-Electric Traction SystemThe most popular non-electric traction systems are −Steam Engine DriveInternal Combustion (IC) Engine Drive or Diesel Engine DriveIn this article, we will highlight the advantages and disadvantages of using these two types of non-electric traction system.Steam Engine DriveIn the steam engine drives, the reciprocating steam engine is used for getting the required motive power. The steam engine drive is not used in these days due to various reasons. However, it is still ... Read More
What is Electro-Extraction?Electro-extraction, also known as electro-winning can be defined in several ways as −Electro-extraction is an electrochemical process that is used for production of metals with commercially acceptable purity.Electro-extraction is the electro-deposition of metals from their ores that have been in electrolytic solution.Electro-extraction is the electrolytic process by which metals can be extracted or separated from their ores.Based upon the physical status of the metal ore, the metal can be extracted in following two ways −When the ore is in solid state - The ore is treated with strong acid to obtain its salt, again this salt is to ... Read More