# PHYSICS : REVISION TEST ON TOPICS OF CLASS XI --IX

The composition of two simple harmonic motions of equal periods at right angle to each other and with a phase difference of  results in the displacement of the particle along ____.
straight line
circle
ellipse
figure of eight
Two mutually perpendicular simple harmonic vibrations have same amplitude, frequency and phase. When they superimpose, the resultant form of vibration is ____.
a circle
an ellipse
a straight line
a parabola
The displacement of a particle varies according to the relation x = 4(cos ( t + sin ( t). The amplitude of the particle is ____.
8
– 4
4
/
10 cm
20 cm
50 cm
Resonance is an example of ____.
tuning fork
forced vibration
free vibration
damped vibration
In case of a forced vibration, the resonance wave becomes very sharp when the ____.
restoring force is small
applied periodic force is small
quality factor is small
damping force is small
/
b = 0 and a = – c
None of the above
/
A simple pendulum is set into vibrations. The bob of the pendulum comes to rest after some time due to ____.
air friction
moment of inertia
weight of the bob
combination of all the above
/
7
1
5
12
/
the motion is oscillatory but not S.H.M.
the motion is S.H.M. with amplitude a
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TOPICS: SUPERPOSITION OF WAVES, OSCILLATIOS

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Kajal Sengupta
Physics 9th to 12 th grade,CIE, Edexcel, AP, IB , CBSE, ICSE
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