# Topic: UNIT X: Oscillations (Test 2)

Topic: UNIT X: Oscillations
Q.1
A hollow sphere is filled with water. It is hung by a long thread. As the water flows out of a hole at the bottom, the period of oscillation will
A. first increase and then decrease
B. first decrease and then increase
C. increase continuously
D. decrease continuously
Explaination / Solution:
No Explaination.

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Q.2
The damping force on an oscillator is directly proportional to the velocity. The units of the constant of proportionality are
A. kg m s−1
B. kg m s−2
C. kg s−1
D. kg s
Explaination / Solution:
No Explaination.

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Q.3
When a damped harmonic oscillator completes 100 oscillations, its amplitude is reduced to 1/3 of its initial value. What will be its amplitude when it completes 200 oscillations?.
A. 1/5
B. 2/3
C. 1/6
D. 1/9
Explaination / Solution:
No Explaination.

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Q.4
Which of the following differential equations represents a damped harmonic oscillator ?
A.
B.
C.
D.
Explaination / Solution:
No Explaination.

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Q.5
If the inertial mass and gravitational mass of the simple pendulum of length l are not equal, then the time period of the simple pendulum is
A.
B.
C.
D.