Zinc is commonly used metal for making protective coating (galvanizing) because it forms an impervious ZnCO3 layer. Zinc protects irons by being more electro positive. It is also used widely as Cu-Zn brasses because Zn has a low melting point, high structural strength, good dimensional stability. It is ideal for die casting. It can also be … Read more
The Electromotive Force or the EMF, measured in coulumbs of charge. This pressure is developed or the electrical intensity or from electrical source or energy. It’s a device that converts any energy form into electrical energy that is later measured with coulumbs of charge. EMF which is Electromotive Force is denoted by, ℰ. So, emf … Read more
The lead accumulator refers to a secondary cell as the electrical energy doesn’t generate itself inside the cell, but it is stored prior to an external source. It’s a reversible cell as the cell reactions are in the reversed state if external emf is suitably bigger than this cell’s emf which is applied. Therefore, … Read more
It is a collection of related web pages contents of which may include images, text, video and audio. Home page is the name given to the first page of a website. There’s a specific internet address (URL) for every website that is required to be entered in the browser for accessing that particular website. A … Read more
Computers can be categorized on the basis of: size and data handling capabilities. Further, on the basis of data handling capabilities, computers can be divided into three types: Analogue Computer Digital Computer Hybrid Computer Analogue computer: They are designed so that they can process the analogue data. The data that can change continuously and do … Read more
The hardware cannot perform tasks completely on its own. This is why Software has to complement hardware to perform a specific task. All programs running on a computer at a given time are software. It can be of two types: Application software and System software. System software Just as the name suggests, it is the … Read more
Secondary memory comprises of the storage devices that are in the computer and the ones that are connected to a computer. It has a non-volatile nature hence even if the computer is turned off, it permanently stores the data. The CPU does not have the authorisation to directly access the secondary memory. Therefore, the data … Read more
It is the fastest and the smallest memory in the computer. It can be found in the CPU in the form of registers. It temporarily holds memory address, frequently used data and instructions and makes it easier for the CPU to access them.
It is of two types: Random Access Memory (RAM) and Read Only Memory (ROM). RAM (Volatile Memory) Since it is a volatile memory, it doesn’t store instructions or data permanently. The moment when the computer is switched on, the instructions and data from the hard disk start getting stored in the RAM. The data stored … Read more
The result that the processed raw data produces, after being entered into a computer by an input device, is displayed by the output devices. Numerous output devices display output in different ways such as images, text, audio, video or hard copies. Some of the most popular output devices are discussed below: Monitor CRT Monitor LCD … Read more