Electric Stress Control: The Electric Stress Control distribution is usually governed by the Poisson's equation: where φ is the potential at a given point, ρ is the space charge density in the region, and ε0 is…
Solid Dielectric Materials and Composites Materials: A good solid dielectric should have some of the properties mentioned earlier for gases and liquids and it should also possess good mechanical and bonding strengths. Many organic and…
Breakdown in Liquid Dielectrics: Liquid are used in high voltage equipment to serve the dual purpose of insulation and heat condition. They have the advantage that a puncture path is self-healing. Temporary failures due to…
Choice of Electrical Drives: Choice of Electrical Drives depends on a number of factors. Some of the important factors are: Steady state operation requirements: Nature of speed torque characteristics, speed regulation, speed range, efficiency, duty…
Types of Electrical Drives: Types of Electrical Drives has the following major parts: load, motor, power modulator, control unit and source. There are large number of loads and each load has its own specific requirements.…
Define Capillarity: Define Capillarity is a phenomenon of rise or fall of liquid surface relative to the adjacent general level of liquid. This phenomenon is due to the combined effect of cohesion and adhesion of…
Surface Tension: Surface Tension - Due to molecular attraction, liquids have properties of cohesion and adhesion. Cohesion is due to the force of attraction between molecules of same liquid. Otherwise, the intermolecular attraction holds the…
Viscosity Unit: Viscosity Unit is the property of a fluid which determines the amount of resistance to a shearing stress. A real fluid has no viscosity but it is nonexistent. Viscosity can also be defined…
Properties of Fluid in Fluid Mechanics: The following properties of fluids are of general importance to the study of fluid mechanics. Mass density (ρ) Specific Volume (v) Specific weight (w) Specific gravity (S) 1. Mass…
Classification of Fluids: Classification of Fluids are as follows. Ideal fluids and Real or Practical fluids. Newtonian fluids and Non-Newtonian fluids. 1 .Ideal Fluids: Ideal fluids are having following properties. It is incompressible. It has zero…
