Keplers’s Laws of Planetary Motion, Kepler's Law, Law of Orbits, Law of Areas, Law of periods

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  Keplers’s Laws of Planetary Motion: 1 st law ( Law of Orbits ): Every planet moves around the sun in elliptical orbit with the sun at one of the foci of the elliptical orbit. 2 nd   law ( Law of Areas): The line joining the planet to the sun sweeps over equal areas in equal intervals of time.                                                             Area of SAB = Area of SCD  2 nd   law tells us that a planet does not move with constant speed around the sun. It speeds up while approaching the nearest point called ‘ perigee’ and slows downs while approaching the farthest point called ‘ apogee’. therefore, distance covered on the orbit with in the given interval of time at perigee is greater than that at apogee such that areas swept are equal. 3 rd Law ( Law of periods): The square of the time periods of revolution of...
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Electric Dipole, Electric Dipole Moment, electric dipole moment dimensional formula

Electric Dipole:

An Electric Dipole is a pair of equal and opposite point charges separated by a short distance.

q and -q are two equal and opposite point cahrges saparated by a small distance 2a


Note:- The total charges of the electric dipole is zero, but this does not mean that the field of the electric dipole is zero.


Electric Dipole Moment:

Dipole Moment is a measure of the strength of electric dipole.

Dipole Moment is equal to the product of the magnitude of either charge and the distance between then.

 Note:- It is a vector quantity whose direction is from negative charge to positive charge.

S.I. Unit of Electric Dipole Moment = C.m

Electric dipole moment dimensional formula:-

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