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 SI unit of current describes the flow of charge at the rate of One ampere per second One coulomb per second One electron per second 6.25 x 10<sup>18</sup>electrons per second Both B and D
2 The current that flows through the coil of a motor causes Its shaft to revolve Its brushes to rotate Motor to move Its shaft to rotate None of these
3 Most practical applications of electricity involve Charges at rest Charges in motion Electrons at rest Atoms in motion Molecules in motion
4 If time period of a pendulum is doubled by increasing its length, then its frequency will Also be doubled Become half Become one fourth Becomes four times
5 INTELSAT operates at frequencies 4, 6, 11, 14 having unit of KHz MHz GHz BHz
6 The number of "Earth Stations" which transmit signals to satellites and receive signals fro them are 3 24 126 200
7 The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec-2comes out to be 980 N 580 N 1380 N Zero
8 If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will Increase Decrease Remain constant None of these
9 Work has the dimensions as that of Torque Angular momentum Linear momentum Power
10 If force and displacement are in opposite direction, the work done is taken as Positive work Negative work Zero work Infinite work
11 The work performed on an object does not depend on Force applied Angle at which force is inclined to the displacement Initial velocity of the object Displacement
12 Work is a always done on a body when A force acts on it It moves through certain distance None of A or B is correct Both A and B are correct
13 Work is a Scalar quantity Vector quantity Base quantity None of these
14 Which one is the least multiple Pico Femto Nano Atto
15 Significant figures in 0.0010 are Four Three Two One
16 1 gm-cm-3is equal to 10<sup>3</sup>kg-m<sup>-3</sup> 10<sup>-3</sup>kg-m<sup>-3</sup> 1kg-m<sup>-3</sup> 10<sup>6</sup>kg-m<sup>-1</sup>
17 Light year is a unit of Time Distance Velocity Intensity of light
18 Silicon can be obtained from Lead Uranium An isotope of oxygen Sand
19 In YDS experiment, fringe spacing means the distance between two consecutive _________ fringes Bright Dark Any of A or B None of these
20 In an interference pattern of Young's Double Slit (YDS) experiment Bright fringes are wider than dark fringes Dark fringes are wider than bright fringes Both dark and bright fringes are of equal width Central fringes are wider than the outer fringes
21 In case of constructive interference of two waves, the amplitude of the resultant wave is __________ either of the waves Greater than Equal to Smaller than None of these
22 The terms phase difference and path difference are Same Different Equal none of these
23 In case of destructive interference of two waves, the amplitude of the resultant wave will be __________ either of the waves. Greater than Smaller than Equal to None of these
24 To observe interference of light, the condition, which must be met with is that the sources must be Monochromatic Phase coherent Both of above None of above
25 Two sources are said to be coherent if they have Same amplitude Same wavelength Definite phase relation with each other None of them
26 The appearance of colours in the soap (or oil) film results from Dispersion Interference Reflection Refraction
27 The appearance of colours in the soap (or oil) film results from Dispersion Interference Reflection Refraction
28 The property of light which does not change with the nature of the medium is Frequency Amplitude Wavelength None of these
29 A line which represents the direction of travel of a wave is known as Spherical wavefront Locus Ray Either B or C
30 Huygen's principle states that Light travels in straight line Light has dual nature Either of these None of these
Download This Set

Is this page helpful?