A mass attached to a spring vibrates back and forth. At the equilibrium position, the
acceleration reaches a maximum.
velocity reaches a maximum.
net force reaches a maximum.
velocity reaches zero.
Q.4.
A body of massgram oscillates freely with natural frequency 1 Hz. When immersed in glycerine it undergoes critically damped motion. The damping force on the oscillator when it's speed is 0.2 cm/s is
8π Newton
8π duvet
4π Newton
4π duve
Q.5.
Which of the following physical quantity is unit less?
Logarithmic decrement
Quality factor
Relaxation time
Both logarithmic decrement & Quality factor.
Q.6.
What is meant by forced oscillation?
When an object is vibrating at its natural frequency
When an object continues to vibrate after the disturbance is removed
When an object vibrates at a frequency which is different from its natural frequency
When an object receives a vibration from external sources
Q.7.
A wave that requires a medium through which to travel
longitudinal wave
transverse wave
standing wave
mechanical wave
Q.8.
Which of the following motions are examples of oscillations?
Vibration of a violin string
Heartbeat
Flapping of wings of a dragonfly
All of above
Q.9.
Which force (s) is (are) present in case of damped oscillation?
Restoring force
Damping force
Both restoring force and damping force.
Restoring force, damping force and external periodic force.
Q.10.
Which one is correct, in case of oscillation?
Displacement and restoring force are in the same direction.
Displacement is always away from mean position where as restoring force is always towards the mean position.
Displacement is always towards the mean position where as restoring force is always away from the mean position.
The direction of displacement and restoring force is random.
Q.11.
The general solution of undamped oscillation is ( where the symbols have their usual meaning)
All of above
x = A₁ elwot + B₁e-iwot
x = A sin (wot + a)
x = A cos(wot + a)
Q.12.
_______________ deals with how much time an object oscillates, while _________________ is how often it oscillates.
frequency; period
period; frequency
wave; cycle
period; cycle
Q.13.
Two simple harmonic oscillators of massgram andgram oscillate separately under the action same restoring force. The ratio of their frequencies is
2:1
1:2
4:1
1:4
Q.14.
A body of mass 1 Kg, executing SHM having potential energy 0.J at the extreme position. If amplitude of oscillation iscm then it's time period is
3.14 sec
0.0628 sec
0.1256 sec
1.57 sec
Q.15.
A particle executing SHM with amplitude 4 cm having total energy 6 J. The displacement of the body, such that its kinetic energy and potential energy will be 3 J each, is
2 cm
2.83 cm
3 cm
1.72 cm
Q.16.
The total energy of 1-d simple harmonic oscillator is 1.2 Joule. It's potential energy, when it is midway between mean position and extreme position, is
2.4 Joule
1.2 Joule
0.6 Joule
0.3 Joule
Q.17.
Which of the following is an example of free oscillation?
A particle oscillating in air medium.
An object suspended from the spring set to vibrate in vacuum.
The springs of dead beat galvanometer.
Vibrating running fork in air medium.
Q.18.
Restoring force, of a body executing oscillation, vanishes at
mean position
extreme position
the midway between mean and extreme position.
It depends on the type of oscillation..
Q.19.
What is the period of a simple pendulum with a length of 50.0 cm? (g = 9.m s−2)
0.359 s
1.42 s
2.48 s
2.78 s
Q.20.
A pendulum with a mass of 0.kg swings with a period of 0.s and amplitude of 2.0 cm. What is the speed when the displacement of the pendulum is −1.0 cm?
8 cm s−1
11 cm s−1
22 cm s−1
36 cm s−1
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