irfan Ahmed

Popular Posts

How data is organized on a magnetic disk?

Before the computer can use a magnetic disk to store data,the disk's surface must be magnetically mapped so that the computer ...
The factors upon which the electric flux depends

Electric flux depends upon the following factors, 1.Magnitude of electric intensity 2.area of surface 3.orientation of the area
How data is stored on a disk ?

You may remember from science projects that one magnet can be used to make another.For example you can make a magnet by taking an i...
Discovery of Oersted

The fact that the electric current through a conductor produces magnetic field around it was discovered by Oersted
keyboard

The keyboard may look like a typewriter keypad to which some special keys have been added. The keys normally available on the keyboards are...
Definition of Farad

Farad is the unit of capacitance.The capacitance of a capacitor is one farad if a cahrge of one coulomb given to one of the plates of a p...
Mutual induction

The process in which a change of current in one coil causes an induced emf in another coil nearby it is called mutual induction
Valence band

A band occupied by valence electrons is called as valence band. It is either completely filled or partially filled. It lies below the condu...
Reactance

The opposition offered by a capacitor to the flow of charge through it is called its reactance
Flash memory

Flash memory is a special type of memory chip that combines the best features of RAM and ROM.Like RAM,flash memory lets a user or pro...