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Electric Field: Electric Dipole
(i) Write an expression (derivation not required) for intensity of electric field in:
(1) Axial position.
(2) Broad side position of an electric dipole, in terms of its length (2a) dipole moment (p) and distance (r).
1.
Intensity of electric field in axial position is:
E1 = 
; p is the dipole moment
2.
Broad Side:
What is the ratio of axial electric field intensity and broad side electrcic field intensity E1: E2 for a short electric dipole?
For short dipole r > > a;
A point charge of 5 x 10-6 C experiences a force of 2 x 10-3 N when kept in a uniform electric field of intensity E. Find E.
Electric field Intensity,
E = 
ndeviated through a uniform electric field 
for intensity 5 x 104 Vm-1 and a uniform magnetic field 
.
(i) Find the magnitude of magnetic flux density B of the magnetic field.
(ii) What is the direction of 
is towards right and 
is vertically downwards in the plane of this paper?
ii) Direction of 
is perpendicular to 
using along the plane of the paper.
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