ECAT Pre Computer Science Chapter 8 online mcq test with answers for Physics chapter 8 (Waves)

ECAT Physics Chapter 8 Waves 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

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