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Obtain an expression for the electric potential due to a small dipole of dipole moment p, at a point r from its centre, for much larger distances compared to the size of the dipole.
Three point charges q, 2q and nq are placed at the vertices of an equilateral triangle. If the potential energy of the system is zero, find the value of n.
State Gauss's Law in electrostatics. Apply this to obtain the electric field E at a point near a uniformly charged infinite plane sheet.
Two long straight wires 1 and 2 are kept as shown in the figure. The linear charge density of the two wires are λ₁ = 10 μC/m and λ₂ = − 20 μC/m. Find the net force F experienced by an electron held at point P.
Two charges + q each are kept '2a' distance apart. A third charge – 2q is placed midway between them. The potential energy of the system is –
Two point charges q₁ and q₂ are located at r⃗₁ and r⃗₂ respectively in an external electric field E⃗. Obtain an expression for the potential energy of the system.
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