ECAT Pre General Science Online Test With Answers

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ECAT Pre General Science Online Test

Sr. # Questions Answers Choice
1 Fluids can transmit: Transverse wave Compressional wave Both of them None of them
2 Transverse waves can be set up: Solids Liquids Gases All of them
3 In compressional wave,the layer of medium having reduced pressure is called: Compression Elasticity Node Rarefaction
4 A string is stretched between two points and is plucked at right angles to its length, the vibration produced is: Longitudinal wave Transverse wave No vibration at all None of them
5 The square of 0.4 is: Greater than 0.4 Smaller than 0.4 Equal to 0.4 None of them
6 In the same medium, velocity of the wave: Goes on increasing Remains constant Goes on decreasing None of these
7 A traveling wave has a shape of: Square wave Sine wave Parabola hyperbola
8 The distance covered by the wave in one second is: Wave number Wave length Frequency Wave speed
9 The distance covered by the wave during one period is called its: Wave number Frequency Wavelength Time period
10 Longitudinal waves are also called: Congressional waves Transverse waves Radio waves None of them
11 Which of the following is not mechanical wave? Sound wave Light wave <div>wave produced in spring</div> None of them
12 When a wave is travels from one place to another, it transfers: Matter Energy Momentum Both B and C
13 Which of the following is/are example/s if mechanical waves i.e. waves generated in _______: Rope Coil of spring Water All of them
14 The waves which propagate out in the space due to oscillations of electric and magnetic fields are called: Mechanical waves Electromagnetic waves Matter waves All of them
15 The waves which propagate through the oscillations of material particles are known as: Mechanical waves Electromagnetic waves Any of them None of them
16 The restoring force is always directed towards: Rest position Equilibrium position Mean position All of them
17 Amplitude is the displacement of the vibrating body from: One extreme position to the other extreme position Mean position any one extreme position Both A and B are correct None of these
18 An oscillating body oscillates due to: Applied force Restoring force Frictional force None of these
19 An angle of 180° in circular motion is equivalent to ______ in SHM. Half the vibration One vibration 3/4th of a vibration None of these
20 In SHM, the acceleration is ______ when velocity is _____: Zero, smallest Smallest, zero Zero, zero Zero, greatest
21 An object in SHM will have maximum speed when its displacement from equilibrium position is: Infinity Maximum Zero Minimum
22 If there identical strings each of constant K are hooked together the spring constant of resultant spring will be: 3 K 2 K K/4 K/3
23 Hertz is unit of: Time period Displacement Amplitude Frequency
24 A spring of constant k = 0.4 N m-1is to be extended thorugh 10 cm at a place where g = 10 m sec-2. The mass to be suspended should be: 4 gms 0.4 gms 40 gms None of these
25 A body with frequency of would complete one vibration in: f seconds 1/f seconds 1 second f<sup>2</sup>second
26 If a given spring of spring constant K is cut into two identical segments, the spring constant of each segment is: K/2 2 K 4 K None of these
27 The number of vibration in two seconds can be expressed as
______ of frequency of vibration is f:
 f 2 f 3 f 1/2 f
28 If a force of 0.05 N produces an elongation of 20 mm in a string, then its spring constant will be: 250 N m<sup>-1</sup> 25 N m<sup>-1</sup> 2.5 N m<sup>-1</sup> None of these
29 If mass of 10 gm is suspended from a spring of K=0.8 Nm-1then the extension will be: 10 cm 1 m 10 mn None of these
30 A particle is moving along a circular path with uniform speed. Its projection will execute ___along the _____ of the circle: Circular motion, circumference Vibratory, chord SHM, diameter SHM, circumference
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