Electric Current: The net charge flowing through a cross-section of a conductor in unit time is called electric current.
Ampere: If one coulomb of charge passes through a cross-section of a conductor in one second, then the current in the conductor is said to be one ampere.
Electric potential at a point: Electric potential at a point is defined as the work done in moving a single positive charge from infinity to that point.
Volt: If one Joule of work is done in carrying one coulomb positive charge from one point to the other, then the potential difference between them is said to be 1 volt.
Electric resistance of a conductor: The electric property of a conductor which opposes the flow of electrons through it is called electric resistance.
Ohm: If a potential difference of 1 volt between two ends of a conductor causes a current of 1 ampere in it, then the resistance of the conductor is said to be one ohm.
Specific resistance of a conductor: The resistance of a conductor having unit area of cross section and unit length is called specific resistance of a conductor or resistivity (ρ).
Watt-hour: The electric charge consumed by an appliance of wattage of 1 watt in an hour is called Watthour.
Watt: If one Joule of work is done in a second then the power is said to be one Watt.
Electro chemical equivalent (e.c.e): The electro chemical equivalent of an element is defined as the mass of its ions liberated at the electrode when one coulomb of electricity is passed through the electrolyte.
Shunt: A small resistance connected in parallel to a moving coil galvanometer to protect it from any large current is called a 'shunt'.
Atomic number: The number of protons in an atom is called atomic number.
Mass defect: The difference between the sum of the individual masses of constituents in a nucleus and the mass of the nucleus itself is called mass defect.
Half-life period of a radio active substance: The half-life period (T) of a radio active substance is defined as the time required for half of its atoms to disintegrate.
Artificial radio activity: A nuclear process in which a stable element is converted into another element, which is radio active in nature is called artificial radio activity.
Intrinsic semiconductors: Pure semiconductors are called intrinsic semiconductors. They consist of equal number of electrons and holes.
Extrinsic semiconductors: The intrinsic semiconductors which are doped with impurities are called extrinsic semiconductors. They consist of unequal number of electrons and holes.
Electron current: The current produced by the motion of electrons is called Electron Current.
Hole current: The current produced by the motion of holes is called hole current.
BIT: A binary digit either '1' or '0' is called a BIT.
BYTE: A group of 8 bits is a 'BYTE'.
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