Physics ECAT Pre Engineering MCQ's Test For Full Book With Answers

Physics ECAT Pre Engineering MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 The wave nature of light was proposed by Newton Thomas Young Huygen None of these
2 Laws of reflection and refraction can also be explained by Particle nature of light Quantum nature of light Wave nature of light Complex nature of light
3 The speed of the secondary wavelets as mentioned in Huygen's principle is ________ the speed of propagation of the wave itself Equal to Greater than Smaller than None of these
4 When the source of light is at very large distance, the shape of wavefront is Spherical Cylindrical Plane None of these
5 Speed of light in vacuum depends upon Frequency Wavelength Amplitude None of these
6 In case of point source of light, shape of wavefront is Spherical Cylindrical Plane None of above
7 Huygen principle is used to determine Speed of light Location of wavefront About polarized and unpolarized light None of them
8 Angle between ray of light and the corresponding wavefront is 0<sup>0</sup> 60<sup>0</sup> 90<sup>0</sup> 120<sup>0</sup>
9 The locus of all the points in the same phase of vibration is called Wave pocket Wavefront Wave number None of these
10 Monochromatic light means wave of Same frequency Same colour Same Wavelength All of them
11 Frequency of red colour as compared to that of violet colour is Equal Smaller Greater None of these
12 Wavelength of red colour as compared to that of violet colour is Smaller Longer Equal None of these
13 Which one of the followings can act approximately as a source of monochromatic light Neon lamp Fluorescent tube Sodium lamp None of these
14 Light waves are Mechanical waves Electromagnetic waves Any of above None of above
15 Electromagnetic waves transport Energy only Momentum only Both A and B None is correct
16 Wavelength of light, on the average, is given by 10<sup>-14</sup>m 10<sup>-10</sup>m 10<sup>-6</sup>m 10<sup>-4</sup>m
17 Light waves are Transverse waves Longitudinal waves Compressional None of them wave
18 Light has Wave nature Dual nature Particle nature None of them
19 The values 1 and 0 are designated as: Continuous values Binary values Boolean values Decimal values Either (B) and (C)
20 The value of LDR depends upon intensity of: Sound falling on it Current passing through it Magnetic field surrounding it Light falling on it Non of these
21 In describing function of digital systems, 1 represents: Closed switch True Statement Lighted bulb Only (B) and (C) All are true
22 Which of the following is most suitable as the core of transformer Soft iron Alinco Steel None of these
23 The practical application of the phenomenon of Mutual induction is Transformers Generator Motor All of these
24 Inverter is the name given to: NOT gate OR gate NOR gate AND gate XOR gate
25 A device which converts Electrical energy into mechanical energy is called as Transformer Generator Motor All of these
26 A.C. can be measure with the help of Nuclear effect Magnetic effect Chemical effect Heating effect
27 An LED emits light when it is: Forward biased Reverse biased Operated without battery Operated with heat source None of these
28 Split rings act as Vibrator Resistor Motor Commulator
29 The work is stored in the inductor as Electric potential energy Elastic potential energy Magnetic energy Absolute potential energy
30 .Depletion region contains: Protons Positive ions Negative ions Both (B) and (C) Both (A) and (C)
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