21. Rainbow is formed due to the ______ sunlight by tiny water droplets.
(A) Polarization
(B) Reflection
(C) Dispersion
(D) Interference
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22. SI unit of the power of a lens is :
(A) Metre
(B) Horse power
(C) Diopter
(D) Watt
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23. A person suffering from shortsightedness can see objects lying in between 20 cm to 100 cm. To see objects lying at infinity he has to use which lens and of what focal length ?
(A) Convex lens, 120 cm
(B) Convex lens, 80 cm
(C) Convex lens, 20 cm
(D) Convex lens, 100 cm
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24 The objective of earthing in houses is :
(A) to provide high voltage to the equipments
(B) to provide as high resistance as possible for conduction of current to the ground
(C) to provide as low resistance as possible for conduction of current to the ground
(D) to provide high current to the equipments
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25. If an object is placed at infinity from a concave lens of focal length 15 cm, then the distance of virtual Image from the lens will be :
(A) 20 cm
(B) 15 cm
(C) 10 cm
(D) at infinity
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26. Which of the following colours is deviated the most while passing through the prism?
(A) Green
[B) Yellow
(C) Red
(D) Violet
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27. There are three copper wires of length and cross-sectional area given by
Respectively. The resistance is minimum for the wire of cross-sectional area –
(A) 2A
(B) A
(C) A/2
(D) It is same for all the three wires
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28. In an electric generator
(A) heat energy is converted into electrical energy
(B) chemical energy is converted into heat energy
(C) chemical energy is converted into electrical energy
(D) mechanical energy is converted into electrical energy
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29. _______ is used to develop Back-end of an application
(A) Database
(B) Statement
(C) GUI
(D) From
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30. Which one of the following is not a search engine ?
(A) Yahoo
(B) Chrome
(C) Google
(D) Bing
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31. ________ was a virus which was first detected on ARPANET.
(A) Concept
(B) StuXnet
(C) Creeper
(D) Storm Worm
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32. Any given Boolean expression can be implemented by using ________
(A) NAND and NOR gates
(B) AND geats only
(C) OR gates only
(D) NOT
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33. The first space ship sent out of the sloz system was :
(A) Pioneer – 1
(B) Mangalyan
(C) Chandrayan
(D) Pioneer – 10
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34. Who is Known as the father of supercomputing ?
(A) Alan Turing
(B) Charles Babbage
(C) Seymour Cray
(D) Vint Cerf
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35. MENCA, an instrument that flew in first Indian MARS Orbiter Mission, is basically a / an ________ spectrometer.
(A) X-Ray
(3) Optical
(C) Imaging
(D) Mass
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36. ________ is but an indian university satellite inspirched for academic purpeched
(A) SWAYAM
(B) PISNT
(C) PRETHAM
(D) SARAL
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37. The concentration of CO2 in the atmosphere is –
(A) 0.03%
(B) 2%
(C) 7%
(D) Zero
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38. Which of the following constitute the strueture of chromowane ?
(A) DNA and RNA
(B) RNA and Histones
(C) DNA and Histones
(D) DNA, RNA and Histones
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39. Which of the following is a cause of Heart Attack ?
(A) When insufficient blood reaches the heart
(B) When a blood clot enters to the arteries
(C) Increase in cholesterol levels of body
(D) All of these
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