Download Comparison between gravitational, electric and magnetic field

Comparison between gravitational, electric and magnetic field
Gravitational
Electric
Magnetic
Mass m
Charge q
Current element I l
F G
mM
r2
F
qQ
4 o r 2
Gravitational field
Gravitational field strength
Gravitational field intensity
Gravitational flux density
GM
g 2
r
Electric field
Electric field strength
Electric field intensity
Electric flux density
Q
E
4 o r 2
g Area
g
A
E Area
E
A
Unit of g is Nkg-1 or ms-2
Unit of E is NC-1 or Vm-1
F IBl
Magnetic field
Magnetic field strength
Magnetic field intensity
Magnetic flux density
Magnetic induction
F
B
Il
Gravitational field strength Electrical field strength is Magnetic field strength is
is the gravitational force per the electrical force per unit the magnetic force per unit
unit mass.
charge.
test current element.
Gravitational flux Magnetic flux Electric flux Gravitational flux = number Electric flux = number of Magnetic flux = number of
of gravitational lines of
electric lines of force/flux ______________ lines of
force cross the area
__________ cross the area
across the area
Area
A
Unit of is Wb
Unit of B is T or Wbm-2
B : Magnetic flux density
: magnetic flux
Book 2 p.9
Book 2 p.33
Book 2 p.
Other Relevant Equation Other Relevant Equation Other Relevant Equation
dV
1. E dr
2. V Edr