Important Definitions on Electrical and Magnetic Phenomenon – Electrical and Magnetic Terms – Important Physics Definitions
Comprehensive blog on important definitions of Electrical and Magnetic Phenomenon. Also contains some terms on Electrical and Magnetic Phenomenon.
Coulomb’s Law: The force of interaction between any two point charges is directly proportional to the products of the charges and inversely proportional to the square of distance between them.
The Superposition Principle: According to this principle, the total force on a given charge is the vector sum of the individual forces exerted on the given charge by all the charges.
Electric Dipole: An electric dipole consists of a pair of equal and opposite point charges separated by a very small distance.
Dipole Moment: Dipole moment is a measure of the strength of electric dipole.
S.I. Unit: Coulomb-metre.
Electrostatic Potential: Electrostatic potential at a point in the field as the amount of work done in moving a unit positive test charge from infinity to that point against the electrostatic forces, along any path. Measured in Volt.
Electric Potential Energy: Electric Potential Energy of a system of point charges as the total amount of work done in bringing the various charges to their respective positions from infinitely large mutual separations.
Unit of Electric Potential Energy: Joule
Electric Flux: Electric Flux over an area in an electric field represents the total number of electric field lines crossing this area. It is represented by ǿE and is given by the product of surface area and the component of electric field intensity normal to the area.
Gauss’s Theorem: According to this theorem, the surface integral of electrostatic field produced by any source over any closed surface S enclosing a volume V in vacuum i.e., total electric flux over the closed surface S in vacuum is 1/Eo times the total charge Q contained inside.
Electrostatic Shielding: Electrostatic Shielding / screening is the phenomenon of protecting a certain region of space from external electric field.
Electric Capacitance: Electric Capacitance of a conductor is a measure of ability of the conductor to store charge on it.
Energy Density in Parallel Plate Capacitor: It is defined as the total energy stored per unit volume of the condenser.
When an electric field is applied to an insulating material, it gets polarized. This means that a dipole moment is created in the material. This dipole moment is also exhibited as a surface charge density.
Electric dipole moment per unit volume is known as polarization.
The energy stored in a capacitor is given by
W=1/2 Cǿ2 =Q2/2C Joules
If two capacitors C1 and C2 are connected in series, then the resultant capacity is given by
C= C1 C2 / C1 + C2
And the resultant capacity of two capacitors C1 and C2 , when connected in parallel is given by C= C1 + C2
Some of Standard Value
e = 1.6 X 10-19 Coulomb
