Electrostatics

Question 1

Quantization of charge

Answer 1

Q=ne

Question 2

Coulomb’s Law

Answer 2

F = K Q1 Q2 / R^2

Question 3

SUPERPOSITION PRINCIPLE

Answer 3

F = F1+ F2+ F3……

Question 4

ELECTRIC FIELD

Answer 4

E = F / Q

E = KQ / R^2

Question 5

E.F OF A RING OF RADIUS A

Answer 5

x axis
E = KQX/ (X^2 + A^2)^3/2

y axis
E = 0

CENTRE
E=0

Question 6

DIPOLE MOMENT

Answer 6

P = Q × LENGTH

Question 7

FIELD ON AXIAL POSITION

Answer 7

E = 2KPX /((X)^2 - (A)^2)^2

Question 8

FIELD ON EQUITORIAL POSITION

Answer 8

E = KP/ ((X^2) + (A^2))^3/2

Question 9

TORQUE ON DIPOLE IN EXTERNAL FIELD

Answer 9

t = P X E

Question 10

FIELD FOR
LONG CONDUCTOR
1. BOTH INFINITE
2. ONE SIDE INFINITE

Answer 10

K LAMBDA/R (SIN PHI 1 + SIN PHI 2)

1. PHI 1 = PHI 2 = 90
2. PHI 1 = 0 PHI 2 = 1

Question 11

LAMBDA
SIGMA
RHO

Answer 11

1. Q/ L
2. Q/ A
3. Q/ V

Question 12

ELECTRIC FLUX

Answer 12

PHI = E.A

Question 13

GAUSS LAW (closed surface)

Answer 13

PHI = q/ eo

Question 14

CLOSED SIRFACE FLUX

Answer 14

INT| E . Ds

Question 15

ELECTRIC FIELD OF PLANE SHEET

Answer 15

E = SIGMA / 2eo

Question 16

FIELD DUE TO SPHERICAL SHELL

1. INSIDE
2. OUTSIDE
3. IN SURFACE

Answer 16

1. 0
2. E = KQ/ r^2

E= SIGMA R^2/eox^2

3. E = KQ / R^2

E = SIGMA/eo