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Formula equations are coulomb’s law, electric field, electric field due to point charge, continuous charge, infinite line of charge and infinite plane of charge, electric flux and electric potential energy.
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1 2 12 2 12
kq q
r
F r
Coulomb’s Law
q
Electric Field
E r ˆ 2 r
q k
Electric Field due to a point charge
E r ˆ 2 r
dq k
Electric Field due to a
continuous charge
2 k E r
E-field due to infinite line of charge
(^2) o
E-field due to an infinite
plane of charge
o
E-field just outside a conductor
E E^ dA
Electric Flux
enc E o
q E dA
Gauss’s Law
p qd^ Electric Dipole Moment
τ p E^ Torque on Electric Dipole
U p E^ PE of electric dipole
B
B A A
U V V V d q
E s
Electric Potential Difference
U qV^ Electric Potential Energy
kq q 1 2 U r
Electric Potential Energy
kq V r
Electric Potential due to a point charge
dq V k r
Electric Potential due to an
extended body of charge
E V^ Relation between V^ and E
Q C V
Capacitance
o A C d
Capacitance for Parallel- Plate Capacitor
Ceq C 1 C 2 Capacitors in Parallel
1 2
C eq C C
Capacitors in Series
oE
Energy Density in an
E-field
C kCo Capacitance with
Dielectric
Eo E k
E-field with Dielectric
Energy in a Capacitor
dQ I dt
Electric Current
Current Density
J E Ohm’s Law
Resistance
V IR “Ohm’s Law”
1 Resistivity
Req R 1 R 2 Resistors in Series
1 2
R eq R R
Resistors in Parallel
t V I t e R
Current Charging
Capacitor
t
q t CV e
Charge Charging
Capacitor
RC Time-Constant
F q v B^ Magnetic Force on a
Moving Charge
F I L B^ Magnetic Force on a
Current-Carrying
Conductor b
a
F I d s B
Magnetic Force on a
Current-Carrying
Conductor
τ μ B^ Torque on Current
Loop
U μ B^ Magnetic Potential
Energy
F qE qv B^ Lorentz Force
H
nqt
Hall Voltage
2
2
o
o
o d
E d o
o B B B B L B
Id d r q
r d I I
d I dt B nI
d
d
dt d d dt d dI N L dt dt N L I
s r B
v r B
E s
2
2
1
( 1 )
U LI
R
L
e R
V I
t
2
2 12 12 1
2
2 2
1
sin
sin 2
sin 2
tan
B o
p rms
p rms
L
x
R p
L p L
c p c
ave rms p
L c
L c
o
V I R t
V I X t
V I X t