Electrical Knowledge

 

Electric Charge:

Atoms are made up of electron, proton and neutrons. When an atom has more electron than proton it is negatively charged and when the proton is more, it is positively charged. When both electron and proton are in same in number it is said to be electrically neutral.
When two like charge or unlike charge place together They produce the electrostatic force between them.
These charges experience a force when placed in an electromagnetic field.
electrons.

Electric current:

Many students think electric current is just only the flow of charged particles but it is not the complete definition. Electric current is the moving of charged particles per unit time.
Current is not a thing that was invented it is a natural force which is present in nature in pure form.
There will never be a shortage of electricity in the world but we didn't have sufficient storage material to store the electricity for a longer time.

In June 1952, Benjamin Franklin was the first man who connection between lightning and electric current by flying a kite, lightning is only an electrical discharge.
Dc Series Motor
Google Plus
Motor

Google plus which was launch on 28 June 2011 as a social networking site operated by the google.
It was created by Vic Gundotra, Bradley Horowitz in Javascript.

Vic Gundotra

It becomes quite famous, the community portal is the best in the google plus, where a user joins together to talk or research about one topic.

Bradley Horowitz

If u are sitting in the USA, you will get the current news or Reseach of others country in your related community which you will not get in daily newspapers.
 In November 2015, there is a change in the design to make it simpler, faster for the user to connect Google+ easily and new features like community and collection were added which become very famous among the user. Educational, News and many communities were created by the user, where people all around the world gather together to share their views on a specific topic. We can join as many as communities. Google+ may lack behind the facebook but many educational article and news were shared on google plus first. Notification widget on google chrome will disappear on 7 March 2019.

 Blogger prefers Google+ to share their views or articles more than facebook.

Articles on Google+ can be shared all over the world but on Facebook, it can only be shared among friends. Users can download their pictures from their account before April otherwise there will be deleted.


Everyone gonna misses their Google+ account and community. The friend circle we created there, will gonna be with us again.

Have you ever wondered by seeing pictures of another galaxy in your phone or books, How these pictures are captured or taken?

These pictures are taken by the telescopes with are orbiting our planet 24*7 all day, all night at           5 miles/sec searching for the new galaxy and planets, searching for a new possibility for a new home planet. Today I will tell you about the Hubble telescope.

C is a very useful and widely used programming language all over the world. It is basically the first programming language which gets so much attention and used by many of the programmers from the starting. It gets is the name 'C' because two programming language ie 'A' and 'B' has been developed before its launch, it is the modified version of both these languages, 'C' was developed by
Dennis M. Ritchie in 1972 and first implemented on DEC PDP-11 computer to develop the UNIX operating system.


                                                                 Dennis M.Ritchie


                                                     
Many of you were thinking what is a programming language?
A programming language is a set of commands to instruct the computer to perform a task. The commands are known as 'code', these codes are then converted into the machine language by the compiler. A compiler is application software which converts the high-level language into a low-level /machine language.

Header file
A header file is a file with extension .h which is used to define the functions that are already stored in the preprocessor file. We don't have to write the whole code to execute that function, we can execute that function by writing the header file at the top.
For ex: #include <stdio.h> (standard input/output) is responsible for taking input by the user and output at the screen.
#include <stdlib>(standard library) is responsible for function which involving memory location,process control and conversion.

Main()
Whenever we compile the program your compiler search for the "main()" function which is the entry of every programming code. int is used before the main function which tells the datatype and at the end, we end with the return0 which is the termination of the program.

Printf & Scanf
Printf is the function in stdlib to display the output in the screen. To print a number we need a
 place holder(%d) which is in quotation mark which stores the output.
For example printf("%d", integer); we need to place a semicolon at the end of the line. The compiler reads the  ";" semicolon as the line terminator.
For printing Decimal, we use "f" in place of "d" with the percentage sign and "s".to add the text.

If you want to add multiple integers, place multiple place holder.
printf("%d  %d  %d",32,56,98);

Scanf is used to take the input from the user.
scanf("%d". &number);
& is used as a simple way to pass the pointer to the store value.

#include<stdlib.h>
#include<stdio.h>

int main()
{
printf("hello world");
return 0;
}

this is the first c program to print' hello world'.




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The use of 60 Hz frequency in the USA is because of Nikola Tesla. Tesla demonstrated the benefits of AC and power distribution. He had done the analysis and figured out that 60 Hz at 220 V was the most efficient means because of the arc lamp. Arc lamp was used at that time and they flicker more when used below 60 Hz frequency so he prefers 60 Hz frequency supply and from that time USA is using 60 HZ frequency supply. 

In England, the engineer prefers 50 Hz supply over 60 Hz because of the several advantages:

• At 50 Hz, eddy current losses and iron losses decrease.
• The radius of the conductor decrease.

England starts using 50 Hz of the frequency power supply.
In India, the first hydropower plant was made at Darjeeling named Sidrapong Hydroelectric Power Station in 1897 when India was ruled by the British. The plant works on 50 Hz and has a capacity of 130 KW. They were using 50 Hz frequency supply in England so In India, they also built the power plant of 50 Hz frequency supply.

Note:

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