UKPCS Science: Conductors, semiconductors and insulators(1) #31

Oracle IAS, the best coaching institute for UPSC/IAS/PCS preparation in Dehradun brings to you UKPCS 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, Read More …

UKPCS Science: Human Eye(3) #28

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) Read More …