Electrostatics Flashcards
1
Q
Quantization of charge
A
Q=ne
2
Q
Coulomb’s Law
A
F = K Q1 Q2 / R^2
3
Q
SUPERPOSITION PRINCIPLE
A
F = F1+ F2+ F3……
4
Q
ELECTRIC FIELD
A
E = F / Q
E = KQ / R^2
5
Q
E.F OF A RING OF RADIUS A
A
x axis
E = KQX/ (X^2 + A^2)^3/2
y axis
E = 0
CENTRE
E=0
6
Q
DIPOLE MOMENT
A
P = Q × LENGTH
7
Q
FIELD ON AXIAL POSITION
A
E = 2KPX /((X)^2 - (A)^2)^2
8
Q
FIELD ON EQUITORIAL POSITION
A
E = KP/ ((X^2) + (A^2))^3/2
9
Q
TORQUE ON DIPOLE IN EXTERNAL FIELD
A
t = P X E
10
Q
FIELD FOR
LONG CONDUCTOR
1. BOTH INFINITE
2. ONE SIDE INFINITE
A
K LAMBDA/R (SIN PHI 1 + SIN PHI 2)
- PHI 1 = PHI 2 = 90
- PHI 1 = 0 PHI 2 = 1
11
Q
LAMBDA
SIGMA
RHO
A
- Q/ L
- Q/ A
- Q/ V
12
Q
ELECTRIC FLUX
A
PHI = E.A
13
Q
GAUSS LAW (closed surface)
A
PHI = q/ eo
14
Q
CLOSED SIRFACE FLUX
A
INT| E . Ds
15
Q
ELECTRIC FIELD OF PLANE SHEET
A
E = SIGMA / 2eo
