What is Resistor ?

          An element which takes control out of voltage by dropping upon it and also to limit the current passing into the conductor through it is called a RESISTOR. This is used in a circuit just to provide not only voltage drop but also acts as a protection device such that it is burned off if the current is too high for protecting the main device.

What is a Database ?

          A Database is a huge ocean where a very large collection of data which are in the form of bits regarding various servers Internet Protocol (IP) Addresses, Uniform Resource Locator (URLs), etc...

If any user needs to access data from any website or URL, the data is being retrieved from the Database and the latter sends every information except some confidential data to the user. It is only a storage bin but with the aid of a Database Management System, it retrieves and sends packets of data to various global DBMS users all over the world. 

What is a Data ?

  

        Data is a raw collection of bits having ones and zeroes in its flip-flop registers. Generally, Data is obtained from real-world entities. Every Body in our Universe is connected to one another such that there is an exchange of information with the combination of exchange of energy and matter in the subatomic region.  

What is a Pixel ?

          

    There are many different kinds of entities in the digital world. This world is made of the smallest parts of color bands. These smallest parts of color bands are called Pixels. These are the building blocks of everybody in the digital world. They convert the real bodies into a cloned (or) virtual ones which are nearly similar to the real-world entities. But the difference is these don't have a real mass but appears to be real as a real-world 2 - dimensional (or) 3 - dimensional entity. These pixels are basically are in three colors. They are known as RGB i.e., Red, Green, and Blue. Everybody (or) object in this digital world is a simulation of the real world. These simulations may be in different periods of time.

What is Capacitor ?

            An element which can store electrical energy in the form of opposite charges strongly attracted to each other by creating a potential across its plates and repelled by a dielectric medium which may be air, paper, etc is called a CAPACITOR. This is used in a circuit in order to filter the AC harmonics if placed in shunt and DC harmonics if placed in series of a circuit. Capacitors are of many types. Some of them are

• Tantalum Capacitors
• Electrolytic Capacitors
• Ceramic Capacitors

What is a Microcontroller ?

        A Microcontroller is a small computer in which the central processing unit, arithmetic operations, set of instructions, etc are a part of it. It is equivalent to a mini computer that can store memory and can do various operations that are all imparted to it.

      Generally, we need the computer to perform various tasks but after the invention of microcontroller, there is no need for the computer to get involved in the work. Only the thing is to impart the program into the microcontroller and memory is attached to it. The microcontroller alone performs the tasks assigned to it.

             In olden days, only 8085 microcontrollers were used to travel through the moon by inserting the chip into the astronaut suit. Now we have sophisticated microcontrollers but there is no development in the space journey after the invasion of the moon rather than scoping for mars and distant planets in our solar system and even to the center of the Milkyway.

            The Microcontroller can alone run the hardware induced software run machines but whereas a microprocessor cannot run individually without the aid of memory and clock devices.

What is a Supernova ?

          There are millions of stars in our universe. Every star has a life cycle. Our universe has average stars and massive stars. Both exhibit heat and light. At some instant of time, star starts to use all its energy and exhibit the all of its light. This is the brightest form of every star in our universe. This stage of star's life cycle is called Supernova. Due to these supernova's the dust and energy which is present in them spreads across the deep space and sometimes forms into a Nebula. Supernova's release the complete light using its fuel which is present in it. These are the brightest objects in this universe. These play a crucial role in the expansion of our universe due to the explosions which take place in them. These explosions spread dust and gases across the deep space which helps in enlarging our universe.