1. What is a semiconductor? The materials in which the electrical conductivity lies between conductors and insulators are called semiconductors. They have resistivity value between 10-4 to . The electrical conductivity of...
Category - Question & Answers
1. What is a conducting material? Metals are good conductors due to the absence of energy gap and the presence of free electrons with low resistivity. 2. Define drift velocity of electrons. Drift velocity (Vd) is the velocity...
1.What is laser? It is a device which produces powerful, monochromatic, collimated beam of light in which the light waves are coherent. It is an acronym for Light Amplification by Stimulated Emission of Radiation. 2. What are...
1.How are sound wave classified? Sound waves are classified into three categories on the basis of frequency. i. Ultrasonic waves (above 20,000 Hz ) ii. Audible waves (20 Hz to 20,000 Hz ) iii. Infrasonic waves (below 20 Hz...
1. What is black body radiation? A perfect black body is that which can absorb radiations of all the wavelengths which fall on it. It neither reflects nor refracts and so it appears black. The radiation emitted by a black body is...
1. What is elasticity? The property by which a body resists a change in its size or shape when an external force is acting on it and returns to the original state after the removal of the deforming force is called elasticity. 2...
1. What is a crystal? (or) What are crystalline materials? Give examples. Crystalline solids (or) crystals are those, in which the constituent atoms (or) molecules are arranged in an orderly fashion throughout in a three...
Tech companies nowadays are looking for candidates with experience in object-oriented techniques and patterns, and they are holding interviews for those candidates. Hiring such personnel has the benefit of allowing them to simply...
In this blog, you can find some problems that are asked in Tech Mahindra aptitude questions. These problems are easy but it is time consuming problems. Practise these questions to get idea for aptitude round for attending Tech...
1. Copper has FCC structure and its lattice parameter is 3.6Å. Find the atomic radius. Given data Lattice parameter of copper (a)=3.6Å Solution: Atomic radius of copper = 1.273 x 10-10m r = 1.273 Å 2. Silver has FCC...
