ECAT Physics Online Test With Answers

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ECAT Physics Online Test

Sr. # Questions Answers Choice
1 When the bob of simple pendulum is at mean position, its K.E will be maximum minimum zero all of them
2 When the bob of simple pendulum is at extreme position, its K.E. will be maximum minimum zero all of them
3 When a mass 'm' is pulled slowly through a distance 'xo' , the elastic potential energy of the spring would be P.E=Kx<sup>2</sup><sub>o</sub> P.E= 1/2kx<sub>o</sub> P.E=1/2Kx<sup>2</sup><sub>o</sub> P.E=Kx<sup>2</sup><sub>o</sub>
4 When a mass 'm' is pulled slowly, the spring stretches by an amount xo, then the work done will be W=Kx<sub>o</sub> W=1/2Kx<sub>o</sub> W=1/2Kx<sup>2</sup><sub>o</sub> W=4Kx<sub>o</sub>
5 When a mass 'm' is pulled slowly, the spring stretches by an amount x0,then the average force would be F= Kx<sub>0</sub> F=1/2Kx<sub>0</sub> F=2Kx<sub>0</sub> F=4Kx<sub>0</sub>
6 If the time period a simple pendulum is 2 s, its frequency would be 2 Hz 1.5 Hz 1.0 Hz 0.5 Hz
7 If the length of a simple pendulum is 0.25 m its time period would be 1.0 s 2.0 s 3.0 s 4.0 s
8 Time period of simple pendulum is independent of length mass acceleration due to gravity none of them
9 Time period of a simple pendulum depends upon the length of the pendulum acceleration due to gravity none of them both of them
10 If the length of second pendulum becomes four times then its time period will become Four time Two times Six times Eight times
11 The weight 'mg' of the bob is resolved into one component two components three components four components
12 The bob of a simple pendulum is suspended by string heavy inextensible string light extensible string light inextensible string
13 A simple pendulum consists of a small light bob small heavy bob big light bob big heavy bob
14 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
15 The phase determines the displacement amplitude frequency state of motion of vibrating body
16 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
17 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
18 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>
19 Angular frequency 'w' is basically a characteristics of linear motion circular motion both of them none of them
20 The expression for restoring force is F=ma F=kx F= -kx Kx=ma
21 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>
22 The expression of Hook's law is F=ma F=kx F= -kx -kx=ma
23 SI unit of frequency is second hertz revolution vibrations/sec
24 Si units of time period is second hertz revolution vibration/sec
25 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
26 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
27 The wave form of S.H.M will be square wave sine wave rectified wave saw-tooth wave
28 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
29 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
30 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
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