Starting of Electric Drives: The most important processes associated with controlled electric drives are (i) starting, (ii) speed control (iii) braking, (iv) reversal of direction of rotation. All these are…
Nature of Electric Supply: The nature of electric supply available may be 3-phase ac, single-phase ac or dc. In case three-phase ac supply is available, polyphase induction motor, squirrel cage…
Resistance Heating - Types, Advantages and Applications: Resistance heating is based upon the I2R effect. This method of heating has wide applications such as heat treatment of metals (annealing, hardening…
What is Metadyne Control? - Construction, Working and Applications: The metadyne control system is based on constant current system of speed control. In resistance control or series- parallel control a…
Design of Lighting Schemes: The Design of lighting schemes should be such that it may, provide adequate illumination, provide light distribution all over the working plane as uniform as possible.…
Types of Lighting Schemes: The distribution of the light emitted by lamps is usually controlled to some extent by means of reflectors and translucent diffusing screens, or even lenses. The…
Incandescent Lamp - Construction, Working and Advantages: For sometimes the arc lamps were used for general lighting purpose but as the carbon-arc lamps were complicated so these have been superseded…
Integrating Sphere in illumination - Construction and Working Principle: It is a piece of apparatus which is now commonly employed for measurement of mean spherical candle power. In this method…