Three point charges q, - 2q and + q are placed at points (x=0 y=a,z=0) .(x = 0,y = 0,z = 0) and (x=a y=0,z=0) respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are
A semi-circular arc of radius 'a' is charged uniformly and the charge per unit length is λ. The electric field at the centre of this are is
A thin conducting ring of radius R is given a charge +Q. The electric field at the centre O of the ring due to the charge on the part AKB of the ring is E. The electric field at the centre due to the charge on the part ACDB of the ring is
A hollow insulated conduction sphere is given a positive 1 charge of 10 μC. What will be the electric field at the centre of the sphere if its radius is 2 metres?
A point Q lies on the perpendicular bisector of an electrical dipole of dipole moment p. If the distance of Q from the dipole is r (much larger than the size of the dipole), then the electric field at Q is proportional to
The electric intensity due to a dipole of length 10 cm and having a charge of 500 μC, at a point on the axis at a distance 20 cm from one of the charges in air, is
