Conceptual Physics

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.

Purpose	Isotope Name
IN MEDICINE
For testing blood	Chromium-51
For testing blood circulation	Na-24
For testing brain tumor	Hg-203
Thyroid problem	I-131
Treatment of Cancer	Co-60
For blood disorders	Au-189
For skin diseases	P-31
IN ARCHAEOLOGY
Carbon Dating	C-14
Determining age of meteorites	K-40
Determining age of earth	Pb isotopes
IN AGRICULTURE
For protecting potato crop from earth worm	Co-60
For artificial rains	AgI
For fertilizers	P-32

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