Arc Lamp -Definition, Working Principle and Types: In an arc lamp electric current is made to flow through two electrodes in contact with each other which are drawn apart. The result is an arc being…
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 the sphere is used to…
What is a Photometer and Photometry? - Working Principle and Types: The candle power of a source in any given direction is measured by comparison with a standard or substandard source employing photometer bench and…
Polar Curve in illumination | Rousseau's Construction: Polar Curve in illumination - All discussions made so far were based on the assumption that the luminous intensity or the candle power from a source is uniformly…
Laws of illumination in Electrical: There are two laws of illumination Law of inverse squares and Lambert's cosine law. Law of Inverse Squares: If a source of light which emits light equally in all directions…
What is illumination? - Terms used in Illumination Light is the prime factor in the human life as all activities of human beings ultimately depend upon the light. Where there is no natural light, use…
Difference Between Resistance and Arc Welding: The Difference between resistance and arc welding is given in table below Particulars Resistance Welding Arc Welding Supply Usually ac only. AC or dc. Voltage Very low. The striking…
Difference Between AC and DC Welding: The Difference between AC and DC welding is given in table below Particulars DC Welding AC Welding Equipment Motor-generator set or rectifier is required in case of availability of…
Advantages and Disadvantages of Arc Welding: The Advantages and Disadvantages of Arc Welding having its distinctive merits and applications. The advantages of arc welding with dc lie in the higher arc stability and the degree…
Electric Welding Machine Working Principle: The electric welding machine sets may be either dc or ac type. 1. DC Welding Sets: Such sets are of two types namely (i) generator type and (ii) rectifier type.…
