Oracle IAS, the best coaching institute for UPSC/IAS/PCS preparation in Dehradun brings to you UKPCS Science (paper #6). Semiconductor p-n junction diode If a crystal of p-type material is joined to a crystal of n-type material a p-n junction forms.
UKPCS -UKPSC Science: Conductors, semiconductors and insulators(3) #36 Read More »
Oracle IAS, the best coaching institute for UPSC/IAS/PCS preparation in Dehradun brings to you UKPCS Science (paper #6). Semiconductor materials Elements that are used as semiconductors, such as silicon and germanium, have four outer shell electrons. This means that they can form four bonds with other identical atoms. In a crystal of pure silicon each silicon atom is
UKPCS-UKPSC Science: Conductors, semiconductors and insulators(2) #35 Read More »
Oracle IAS, the best coaching institute for UPSC/IAS/PCS preparation in Dehradun brings to you UKPCS-UKPSC Science (paper #6). Classifying materials Materials can be placed into three groups according to their electrical resistance: conductors semiconductors insulators Insulators and pure semiconductors have a very high resistance, while conductors have a very low resistance. This difference in conduction is explained by electron
UKPCS-UKPSC Science: Conductors, semiconductors and insulators(1) #34 Read More »
Oracle IAS, the best coaching institute for UPSC/IAS/PCS preparation in Dehradun brings to you UKPCS Science (paper #6). A telescope is an important tool for astronomy that gathers light and directs it to a single point. Some do this with curved mirrors, some with curved lenses, and some with both. Telescopes make faraway things look bigger, brighter and
UKPCS-UKPSC Science: Telescope #33 Read More »
Oracle IAS, the best coaching institute for UPSC/IAS/PCS preparation in Dehradun brings to you UKPCS Science (paper #6). A microscope is a scientific instrument. It makes things normally too small to be seen look larger. This way they can be seen better and examined correctly. People who use microscopes commonly in their jobs include doctors and scientists. Microscopes
UKPCS-UKPSC Science: Microscope #32 Read More »
Oracle IAS, the best coaching institute for UPSC/IAS/PCS preparation in Dehradun brings to you UKPCS Science (paper #6). Defects of vision and their corrections: There are three common defects of vision. They are: 1) Myopia (Short-sightedness or Near-sightedness) 2) Hypermetropia (Long-sightedness or Far-sightedness) 3) Presbyopia Myopia
UKPCS Science: Human Eye(3) #31 Read More »
Oracle IAS, the best coaching institute for UPSC/IAS/PCS preparation in Dehradun brings to you UKPCS Science (paper #6). Working of the Eye The light rays coming from the object enter the eyes through pupil and falls on eye lens. The eye lens then converge the light rays and produce an image of the object on retina which is
UKPCS Science: Human Eye(2) #30 Read More »
Oracle IAS, the best coaching institute for UPSC/IAS/PCS preparation in Dehradun brings to you UKPCS Science (paper #6). Parts of eye: Sclera: The knowledge of eye parts and functions is both useful and interesting. The white part of our eyes is known as sclera. It consists of fibrous tissues. The job of this part it to protect the
UKPCS Science: Human Eye(1) #29 Read More »
Oracle IAS, the best coaching institute for UPSC/IAS/PCS preparation in Dehradun brings to you UKPCS -UKPSC Science (paper #6). Electricity can be hazardous. Insulation, earthing, fuses and circuit breakers help to protect us from electrical injury. Electrical energy is current multiplied by voltage and time. Insulators are used in electrical equipment to support and separate electrical conductors without
UKPCS-UKPSC Science: Electrical safety #28 Read More »
Oracle IAS, the best coaching institute for UPSC/IAS/PCS preparation in Dehradun brings to you UKPCS Science (paper #6). An electrical/power grid is an interconnected network for delivering electricity from suppliers to consumers. It consists of generating stations that produce electrical power, high voltage transmission lines that carry power from distant sources to demand centers, and distribution lines that
UKPCS Science: Electrical/power grid #27 Read More »
