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+ Techno World Inc - The Best Technical Encyclopedia Online! » Forum » THE TECHNO CLUB [ TECHNOWORLDINC.COM ] » Career/ Jobs Zone » Placement Papers » 3i INFOTECH
 3i INFOTECH TECHNICAL QUESTIONS - 4
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3i INFOTECH TECHNICAL QUESTIONS - 4
« Posted: July 12, 2007, 08:37:09 PM »


3i INFOTECH TECHNICAL QUESTIONS - 4


91. A man speaks the truth 3 out of 4 times. He throws a die and reports it to be a 6. What is the probability of it being a 6? (a) 3/8 (b) 5/8 (c) ? (d) None of the above Ans. (a) 92. If cos2A + cos2B + cos2C = 1 then ABC is a (a) Right angle triangle (b) Equilateral triangle (c) All the angles are acute (d) None of these Ans. (a) 93. Image of point (3,8) in the line x + 3y = 7 is (a) (-1,-4) (b) (-1,4) (c) (2,-4) (d) (-2,-4) Ans. (a) 94. The mass number of a nucleus is (a) Always less than its atomic number (b) Always more than its atomic number (c) Sometimes more than and sometimes equal to its atomic number (d) None of the above Ans. (c) 95. The maximum KE of the photoelectron emitted from a surface is dependent on (a) The intensity of incident radiation (b) The potential of the collector electrode (c) The frequency of incident radiation (d) The angle of incidence of radiation of the surface Ans. (c 96. Which of the following is not an essential condition for interference (a) The two interfering waves must be propagated in almost the same direction or the two interfering waves must intersect at a very small angle (b) The waves must have the same time period and wavelength (c) Amplitude of the two waves should be the same (d) The interfering beams of light must originate from the same source Ans. (c) 97. When X-Ray photons collide with electrons (a) They slow down (b) Their mass increases (c) Their wave length increases (d) Their energy decreases Ans. (c) 98. An electron emits energy (a) Because its in orbit (b) When it jumps from one energy level to another (c) Electrons are attracted towards the nucleus (d) The electrostatic force is insufficient to hold the electrons in orbits Ans. (b) 99. An electron emits energy (a) Because its in orbit (b) When it jumps from one energy level to another (c) Electrons are attracted towards the nucleus (d) The electrostatic force is insufficient to hold the electrons in orbits Ans. (b) 100. How many bonds are present in CO2 molecule? (a) 1 (b) 2 (c) 0 (d) 4 Ans. (d)

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