VALUES 8) Electric flux:
Qlq Charge Flux linking an area is defined as the number
Force between the charges of field lines passing through given area
Electric field intensity perpendicularly.
Linear charge density 9) Gauss's law : Flux linking any closed surface
Surface charge density 1
Volume charge density is always cqual to times the net charge
Permittivity of free space enclosed by the surface.
: Permittivity of medium 10) Electric potential:
Relative permittivity Electric potential at a point in a field is defined
: Dielectric constant as the amount of work done in bringing a unit
: Electric flux positive test charge from infinity to that point.
11) Potential difference:
Unit vector along normal The potential difference between two points is
Distance from charge /body centre defined as the amount of work done in bringing
R : Radius unit positive charge from one point to another.
Gradient 12) Electricpotential energy:
Electric potential /Potential difference (Voltage) Work done in bringing a charge particle from
dY Smallchange in position vector infinity to a point in field, will store as potential
Work done
energy in the charge.
W
13) Equipotential surface:
: Dipole moment It is the surface where the potential at any point
Potential energy of the surface has the same value.
C : Capacitance 14) Electric dipole:
b/w: Between Two equal and opposite charges, separated by
DEFINITIONS afinite distance constitute adipole.
15) Dipole moment: charges
1) Charge :
property of matter due to Product of magnitude of either of the
known as
dipole and the dipole length is
It is the fundamental
matter experiences the effect of electric in
which dipole moment.
and magnetic fields. 16) CORONA Discharge: of
Linear charge density: field on the surface
2) When the electric
body.
Charge per unit length of a conductor (o/8,) exceeds
the electric strength
3) Surface charge density: becomes conducting
and the
area at the body. of air, the air
Charge per unit surface conductor loses charge. This
action
Volume charge density: surface of Gwill be
4) volume of the body. sharp points, where
usually occurs at 'CORONA
Charge per unit phenomena is known as
Electric field: high. This
5) surrounding a charged Discharge'.
influence
The region of influence other charge amount
upto whichit can defined as the
Capacitance:
17)
body of a body is
rise of potential of
Capacitance
particles. required per unit
Electricfield intensity: uniform. of charge
6)
field lines passing throught the body.
Number of Condenser OR
Capacitor:
which increases
charge placedin
the field.18) arrarngement of conductors at relatively
unit An conductor
Force acting per capacity of the one condenser.
point):
Neutral point (Null electric field intensity is
the as capacitoror
called
7) resultant low potential is
Point where
zero.
, 19) Series Combination: 5) Electric field intensity due to point charge
Two or more capacitors are said to be in series
if same amount of charge passes through all the
capacitors one after the other.
20) Parallel Combination: E=
1 Q
4TE, r*
Two or more branches are said to be in parallel
if they are connected between same set of points direction: away from charge ifq is +ve towards
(or) if they have same voltage across them. charge if q is -ve.
FORMULAE 6) Null point : (al<0)
1) Quantization of charge : Like charge
net charge on any body is given by 0=tne d
n:number of electrons supplied to the body or
removed from the body. +1
2) Coulomb's law : Force between two charges
Unlike charge
N d
r
k-*-d
F=
1 Q,,
(for air medium)
4nE
7) Electric flux :
For a closed surface
F=
(for other media)
4n(ke,) 2 =f(E)dcos@=[E-ds
3) K-t
ds = dsî
ds
1
F:
4nE, (r -t+tVky?
Electric flux for uniform field is
4 Force on a charge particle placed in electric 8)
field. = EScose = Ë-$
E Ymax
=+ES when lines are perpendicular to
surface.
F
F= gE min =0 when liens are parallel to surface.
=+ve for leaving flux.
in vector form F= gË =-ve for entering flux.
9) Number of field lines coming out (or) entering
direction of and is same if gis +ve and
opposite if q is -ve. in for a charge 'q is
Qlq Charge Flux linking an area is defined as the number
Force between the charges of field lines passing through given area
Electric field intensity perpendicularly.
Linear charge density 9) Gauss's law : Flux linking any closed surface
Surface charge density 1
Volume charge density is always cqual to times the net charge
Permittivity of free space enclosed by the surface.
: Permittivity of medium 10) Electric potential:
Relative permittivity Electric potential at a point in a field is defined
: Dielectric constant as the amount of work done in bringing a unit
: Electric flux positive test charge from infinity to that point.
11) Potential difference:
Unit vector along normal The potential difference between two points is
Distance from charge /body centre defined as the amount of work done in bringing
R : Radius unit positive charge from one point to another.
Gradient 12) Electricpotential energy:
Electric potential /Potential difference (Voltage) Work done in bringing a charge particle from
dY Smallchange in position vector infinity to a point in field, will store as potential
Work done
energy in the charge.
W
13) Equipotential surface:
: Dipole moment It is the surface where the potential at any point
Potential energy of the surface has the same value.
C : Capacitance 14) Electric dipole:
b/w: Between Two equal and opposite charges, separated by
DEFINITIONS afinite distance constitute adipole.
15) Dipole moment: charges
1) Charge :
property of matter due to Product of magnitude of either of the
known as
dipole and the dipole length is
It is the fundamental
matter experiences the effect of electric in
which dipole moment.
and magnetic fields. 16) CORONA Discharge: of
Linear charge density: field on the surface
2) When the electric
body.
Charge per unit length of a conductor (o/8,) exceeds
the electric strength
3) Surface charge density: becomes conducting
and the
area at the body. of air, the air
Charge per unit surface conductor loses charge. This
action
Volume charge density: surface of Gwill be
4) volume of the body. sharp points, where
usually occurs at 'CORONA
Charge per unit phenomena is known as
Electric field: high. This
5) surrounding a charged Discharge'.
influence
The region of influence other charge amount
upto whichit can defined as the
Capacitance:
17)
body of a body is
rise of potential of
Capacitance
particles. required per unit
Electricfield intensity: uniform. of charge
6)
field lines passing throught the body.
Number of Condenser OR
Capacitor:
which increases
charge placedin
the field.18) arrarngement of conductors at relatively
unit An conductor
Force acting per capacity of the one condenser.
point):
Neutral point (Null electric field intensity is
the as capacitoror
called
7) resultant low potential is
Point where
zero.
, 19) Series Combination: 5) Electric field intensity due to point charge
Two or more capacitors are said to be in series
if same amount of charge passes through all the
capacitors one after the other.
20) Parallel Combination: E=
1 Q
4TE, r*
Two or more branches are said to be in parallel
if they are connected between same set of points direction: away from charge ifq is +ve towards
(or) if they have same voltage across them. charge if q is -ve.
FORMULAE 6) Null point : (al<0)
1) Quantization of charge : Like charge
net charge on any body is given by 0=tne d
n:number of electrons supplied to the body or
removed from the body. +1
2) Coulomb's law : Force between two charges
Unlike charge
N d
r
k-*-d
F=
1 Q,,
(for air medium)
4nE
7) Electric flux :
For a closed surface
F=
(for other media)
4n(ke,) 2 =f(E)dcos@=[E-ds
3) K-t
ds = dsî
ds
1
F:
4nE, (r -t+tVky?
Electric flux for uniform field is
4 Force on a charge particle placed in electric 8)
field. = EScose = Ë-$
E Ymax
=+ES when lines are perpendicular to
surface.
F
F= gE min =0 when liens are parallel to surface.
=+ve for leaving flux.
in vector form F= gË =-ve for entering flux.
9) Number of field lines coming out (or) entering
direction of and is same if gis +ve and
opposite if q is -ve. in for a charge 'q is
