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ELECTRIC DIPOLES. In these notes, I write down the electric field of a dipole, and also the net force and the torque on a dipole in the electric field of other charges.
Definition. A dipole is normally considered as a combination of 2 equal point electric charges, of opposite signs, separated by a small distance. Dipole moment. The dipole moment, measured in coulomb metres, is the product of either charge (or pole) and the distance between them.
An electric dipole is a +Q and a Q separated by a vector a Very common system, e.g. in atoms and molecules The electric dipole moment is p= Qa pointing from Q to +Q
1 Σεπ 2005 · Electric Dipole. Let’s consider the simplest multi-charge system: just two oppositely charged particles—a system referred to as an electric dipole. Let’s calculate the electric field anywhere along the x axis (result will actually apply anywhere in the x-z plane for y=0).
An electric dipole is formed by two point charges +qand qconnected by a vector a. The electric dipole moment is de ned as p= qa . By convention the vector apoints from the negative to the positive charge. Here we also take the origin to be at the centre and ato be aligned to the zaxis (see diagram) Figure 1: Diagram of electric dipole aligned ...
ELECTRIC DIPOLES. In these notes, I write down the electric field of a dipole, and also the net force and the torque on a dipole in the electric field of other charges.
On the atomic and sub-atomic scale, the magnetic and electric dipole moments reveal structural information about the systems. On a much larger scale, dipole antennae are important in radio transmission and reception. In this module, we will discuss one of the two types of dipoles, the electric dipole.
