Oscillations - Online Test
Q1. A spring has a certain mass suspended from it and its period for vertical oscillations is . The spring is now cut into two equal halves and the same mass is suspended from one of the halves. The period of vertical oscillations is now .The ratio of / is
Answer : Option D
Explaination / Solution:
No Explaination.
Q2. A simple spring has length l and force constant K. It is cut into two springs of lengths and such that =n. (where n is an integer), the force constant of the spring of length is
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. In the arrangement shown in the figure, if the block of mass m is displaced, the frequency is given by
Answer : Option A
Explaination / Solution:
No Explaination.
Q4. Two pendulums of length I meter and 16 meters start vibrating one behind the other from the same stand. At some instant the two are in the mean position in the same phase. The time period of shorter pendulum is T. The minimum time after which the two threads of the pendulums will be one behind the other is
Answer : Option C
Explaination / Solution:
No Explaination.
Q5. For all practical purposes, the motion of a simple pendulum is SHM,
Answer : Option D
Explaination / Solution:
No Explaination.
Q6. A rubber ball with water, having a small hole in its bottom is used as the bob of a simple pendulum. The time-period of such a pendulum:
Answer : Option B
Explaination / Solution:
No Explaination.
Q7. A mass M is suspended from a spring of negligible mass. The spring is pulled a little and then released so that the mass executes simple harmonic oscillations with a time period T.
Answer : Option D
Explaination / Solution:
No Explaination.
Q8. The bob of a simple pendulum has a mass of 20 g. The period of oscillations of the pendulum is 0.75 s. When the mass of bob is increased to 40 g, without any other change, the time period now becomes
Answer : Option D
Explaination / Solution:
No Explaination.
Q9. A pendulum suspended from a ceiling of a train has a period T when the train is at rest. When the train is accelerating with a uniform acceleration α, the period of oscillation will
Answer : Option B
Explaination / Solution:
No Explaination.
Q10. If the length of a simple pendulum is increases by 1percent, then the new time-period
Answer : Option B
Explaination / Solution:
No Explaination.
