Electrical resistivity and conductivity 1 Ω⋅m. Electrical conductivity or specific conductance is the reciprocal of electrical resistivity, and measures a material's ability to conduct an electric current. It is commonly represented by the Greek letter σ (sigma), but κ (kappa) (especially in electrical engineering) or γ (gamma) are also occasionally used. Its SI unit is siemens per metre (S/m). In an ideal case, cross-section and physical composition of the examined material are uniform across the sample, and the electric field and current density are both parallel and constant everywhere. Many resistors and conductors do in fact have a uniform cross section with a uniform
Special measures the action plan has been completed and all points satisfactorily addressed, then they will refer the school back to Ofsted and ask them to schedule a second Section 5 Inspection. If Ofsted agree with HMI’s judgement, the school is then removed from the special measures category. It is worth noting that during an Inspection an HMI can change the nature of the Inspection to a Section 5, and remove the school from Special Measures upon completion. Support for schools that enter special measures comes in a variety of forms, and varies from local authority to local authority. Typically though schools