Question

a computer can talk and understand in numbers that too in only two numbers called​

Answer 1

Answer:

1 & 0

it's known as a binary language

Answer 2

Explanation:

There was a time, when electronics were just resistors, vacuum tubes, capacitors, etc. Clever people built different things like light bulbs and electromotors. However, the problem was that logic like math was really difficult to map, especially since signals weakened in circuits. Materials at the time weren't as pure and refined as we can make them today, so some rough way to tell defined signals apart had to be developed. The idea to establish voltage-levels to transmit different information. For example 0-1V: 0, 1-3V: 1, 3-5V: 2, etc.Systems like that were created but soon afterwards, people found out that they are difficult to work logicwise.

The problem with this scheme is that keeping the current stable is very hard. Current fluctuates all the time. You would end up making wrong readings so frequently that your computer would be useless.

So, we have fall back to binary. Approximately 0V is read as binary 0 (there's tolerance up to 0.8V IIRC) and approximately 5V is read as 1 (anything more than 2V, actually). There is a no-fly zone between 0.8V and 2V.

So till now you understood "Computer is an electronic machine" and it has many many circuits built inside it. But how it actually works ? Let me give you one example : -when you press the key 'A', your keyboard sends a combination of 1s and 0s through a bundle of 7 wires.

Okay now what actually happens when you press the key 'A' ?

Our computer has a standard code for each character, like 'A', so when you press the key 'A', its standard code '1000001' is sent to the computer by your keyboard(send electrical current). There are Seven wires for your keyboard. The standard code of 'A' is '1000001'. Your keyboard sends an electrical current through the first wire(that represents 1), then no current at all through the second, third, fourth, fifth and sixth wire (which represents 0) and then, an electrical current again through the seventh wire.

Now the question is how does your computer understand the code you just sent?

As I said earlier, computer has many many circuits built inside it, when you send the electrical signals, they are directed to these circuits. Computer can not understand us but, they can understand that 'so-in-so' circuit has current passing through it. So when your keyboard sends the electrical signals, at that time, computer does not get the code. Your computer says, "Okay, circuit number one received an electrical current, so that means one. Circuit Number two did not receive any current therefore, it must be zero........and circuit number seven received an electrical current so that means 1. Now, its 1, 0, 0, 0, 0, 0, 1. That means the user is trying to send me this code.

Hope you understood practically how computer work also.