ECAT Pre General Science Online Test With Answers

image
image
image

ECAT Pre General Science Online Test

Sr. # Questions Answers Choice
1 Acceleration of the mass at any instant is given by a=k/m x a= - m/k x a = - k/m x a=m/k x
2 The phase determines the displacement amplitude frequency state of motion of vibrating body
3 The characteristic of a body executing S.H.M is that its acceleration is inversely proportional to displacement directly proportional to displacement independent of displacement equal to zero
4 The instantaneous velocity of a body moving along a circle is directed along the radius along the tangent away from the circle none of them
5 When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be 45<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 90<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 135<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 180<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
6 Angular frequency 'w' is basically a characteristics of linear motion circular motion both of them none of them
7 The expression for restoring force is F=ma F=kx F= -kx Kx=ma
8 If F=0.04 N and X=4 cm then K= 1 Nm<sup>-1</sup> 2 Nm<sup>-1</sup> 3 Nm<sup>-1</sup> 4 Nm<sup>-1</sup>
9 The expression of Hook's law is F=ma F=kx F= -kx -kx=ma
10 SI unit of frequency is second hertz revolution vibrations/sec
11 Si units of time period is second hertz revolution vibration/sec
12 An object undergoes S.H.M has maximum acceleration when its displacement form the means position maximum zero half of the maximum value one third of the maximum value
13 An object undergoes S.H.M has maximum speed when its displacement from the mean position is maximum zero half of the maximum value one third of the maximum value
14 The wave form of S.H.M will be square wave sine wave rectified wave saw-tooth wave
15 If the displacement of a body executing S.H.M is plotted against time, then the curve is known as frequency of S.H.M period of S.H.M wave form none of them
16 Which of the following does not exhibit S.H.M? a plucked violin string a mass attached to a spring a train shunting between two terminals a simple pendulum
17 Which of the following is an example of a S.H.M? motion of a projectile motion of a train along a circular path motion of swing electrons revolving sound the nucleus
18 When a body is performing S.H.M., its acceleration is inversely proportional to the displacement directly proportional to the applied force directly proportional to the amplitude directly proportional to the displacement but in opposite direction
19 For a body executing S. H. M, its momentum remains constant potential energy remains constant kinetic energy remains constant total energy remains constant
20 The maximum displacement of a body on either side of its equilibrium position is called frequency amplitude displacement time period
21 The number of vibrating body at any instant from its equilibrium position is called displacement frequency amplitude time period
22 The time required to complete on vibration is called frequency total time time period velocity
23 One complete round trip of the body about its mean position is called displacement vibration a complete motion an acceleration
24 The vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called rotatory motion motion under gravity angular motion simple harmonic motion
25 The vibratory or oscillatory motion of a body is translatory motion back and forth motion about its mean position free all motion circular motion
26 The force which opposes the applied force producing the displacement in the spring is called restoring force periodic force centripetal force resistive force
27 The restoring force always directed towards the extreme position mean position both of them none of them
28 When a body is pulled away from its rest or equilibrium position and then released, the body oscillates due to applied force momentum restoring force none of them
29 Example of vibratory motion is mass suspended from a spring a bob of simple pendulum mass attached to a spring placed all of them
30 When an oscillatory motion repeats itself, then this type of motion is called vibratory motion constant motion fixed motion periodic motion
Download This Set
×