COMPARISON OF ELECTRIC FIELD AND MAGNETIC FIELD

 

ELECTRIC FIELD	MAGNETIC FIELD
Source is “ Charge”	Source is current
Obeys inverse square law	Obeys inverse square law
Obeys principle of superposition	Obeys principle of superposition
It is independent of angle	It is dependent on angle
Electric field lines don’t form close loops	Magnetic field lines form closed loops
Electric field changes kinetic energy of particle	Magnetic field doesn’t change kinetic energy of particle.
A particle experiences electric field whether it is at rest or in motion	A particle experiences magnetic field only in motion and a charge at rest doesn’t experience the magnetic field.

Inverse Square Law Calculation for Point Gamma source

The inverse square law provides a simple way to calculate the exposure from a point gamma
source at different distances