ECAT Physics Online Test With Answers

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ECAT Physics Online Test

Sr. # Questions Answers Choice
1 The results of mechanical tests are usually expressed in terms of stress strain stress and strain neither strees nor strain
2 The ability of the body to return to its original shape is called deformation stretching compressing elasticity
3 The crystalline structure of NaCI is rectangular hexagonal tetrahedral cubical
4 The smallest three dimensional basic structure in a crystalline solid is called lattice point crystal lattice cubic crystal unit cell
5 Polymeric solids have low specific gravity high specific gravity either of them none of them
6 Synthetic materials fall into the category of crystalline solids amorphous polymeric solids all of them
7 On heating, glass gradually softens into a paste like before it becomes a very viscous liquid at almost 600<b style="color: rgb(34, 34, 34); font-family: sans-serif;">°</b>C 7600<b style="color: rgb(34, 34, 34); font-family: sans-serif;">°</b>C 800<b style="color: rgb(34, 34, 34); font-family: sans-serif;">°</b>C 900<b style="color: rgb(34, 34, 34); font-family: sans-serif;">°</b>C
8 Glass is an example of crystalline solid amorphous solid polymeric solid none of them
9 Amorphous solids are also called as crystalline solids polymeric solids glassy solids any one of them
10 Amorphous solids are also more like crystalline solids gases liquids any one of them
11 Every crystalline solid has definite melting point different melting points may or may not be definite none of them
12 The cohesive forces between atoms, molecules or ions in crystalline solids maintain the strict short range order long range order both of them none of them
13 In metallic crystals which of the following thing remains constant amplitude of oscillations temperature of solid average atomic positions all of them
14 The amplitude of oscillation of each atom in a metallic crystal rises with the rise in temperature decrease in temperature even temperature remains constant all of them
15 The molecules or ions in a crystalline solids are static not static randomly moving all of them
16 The vast majority of solids are in the form of amorphous structure polymeric structure crystalline structure all of them
17 The neighbours of every molecule in crystalline solids are arranged in an irregular manner a regular manner any manner none of them
18 The solids which has structure in-between order and disorder are called amorphous solids polymeric solids crystalline solids all of them
19 There is a regular arrangement of molecules in a amorphous solids polymeric solids crystalline solids none of them
20 If a freely oscillating system is subjected to an external force, then free vibrations will take place the body will move with its natural frequency forced vibrations will take place none of them
21 The natural frequency of a pendulum which is vibrating freely, depends upon its mass length material all of them
22 The frequency of free vibrations is known as free frequency forced frequency natural frequency un-natural frequency
23 A body is executing free vibrations when it oscilates with the interference of an external force without the interference of an external force with the interference of an internal force none of them
24 If a simple pendulum is shifted from karachi to K-2 cliff, its time period remains the same decreases increases none of them
25 The time period of pendulums of different lengths would be same different both of them none of them
26 A second's pendulum is a pendulum whose time period is 1 second 2 seconds 3 seconds 4 seconds
27 If the mass of the simple pendulum becomes double, its time period increase decreases remains constant none of them
28 If we increase the length of a simple pendulum four times, its time period will become 2 times 3 times 4 times 6 times
29 Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of very small energy very large energy frictional forces acceleration due to gravity
30 The total energy of spring mass system is zero changing with time constant none of them
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