Electric Dipole
Two equal and opposite charges placed at a very short distance from each other is called an electric dipole. For example NaCl, NaO…
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Electric Field
The area around a charge in which, if a test charge introduced, will experience some force due to the charge, is called the electr…
Fields
The temperature has a definite value at every point in a room. Temperature at any point can be measured by putting thermometer at …
Charge is Conserved
When a glass rod is rubbed with silk then a positive charge appears on the rod, experiments show that a corresponding negative cha…
Charge is quantized
In Franklin's days the charge was considered to be a continuous fluid. However in these days the fluids like air or water themselv…
Coulomb's Law
Charles Augustin Coulomb measured electrical attraction and repulsion quantitatively and deduced the law that governs them. State…
Electrc Charge
When we walk across the carpet in dry weather and then touch the metal door knob a spark can be drawn. This is due to transfer of …
Microscopic Form of Ohm's Law
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Let us consider a conductor of length L having cross-sectional area A. Let i is the current passing through through the conductor …
Electromagnetism; a preview
The Greek knew before 600 B.C that a rubbed stick could attract the pieces of amber . This observation led to the development of m…
Free electrons in metals and related terms
Ohm's law depends upon the property of conduction of a material. It is obeyed by some materials and disobeyed by some others.Here …
