Oscillations Test

Result

Oscillations Test - 34

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Weekly Quiz Competition

Question 1
4 / -1

What is the velocity of the bob of a simple pendulum at its mean position, if it is able to rise to vertical height of 10 cm (g = 9.8 m/s²)

A
2.2 m/s

B
1.8 m/s

C
1.4 m/s

D
0.6 m/s

Solution
Question 2
4 / -1

Identify correct statement among the following

A
The greater the mass of a pendulum bob, the shorter is its frequency of oscillation

B
A simple pendulum with a bob of mass M swings with an angular amplitude of 40°. When its angular amplitude is 20°, the tension in the string is less than Mg cos 20°

C
As the length of a simple pendulum is increased, the maximum velocity of its bob during its oscillation will decrease

D
The fractional change in the time period of a pendulum on changing the temperature is independent of the length of the pendulum
Question 3
4 / -1

The bob of a pendulum of length l is pulled aside from its equilibrium position through an angle θ and then released. The bob will then pass through its equilibrium position with a speed v, where v equals

A

B

C

D

Solution
Question 4
4 / -1

A pendulum bob has a speed of 3 m/s at its lowest position. The pendulum is 0.5 m long. The speed of the bob, when the length makes an angle of 60° to the vertical, will be (If g = 10 m/s²)

A
3 m/s

B

C

D
2 m/s

Solution
Question 5
4 / -1

The time period of a simple pendulum is 2 s. If its length is increased 4 times, then its period becomes

A
16 s

B
12 s

C
8 s

D
4 s

Solution
Question 6
4 / -1

In a simple pendulum, the period of oscillation T is related to length of the pendulum l as

A

B

C

D

Solution
Question 7
4 / -1

A pendulum has time period T. If it is taken on to another planet having acceleration due to gravity half and mass 9 times that of the earth then its time period on the other planet will be

A

B
T

C

D

Solution
Question 8
4 / -1

A plate oscillates with time period ‘T’. Suddenly, another plate put on the first plate, then time period

A
Will decrease

B
Will increase

C
Will be same

D
None of these
Question 9
4 / -1

The time period of a simple pendulum when it is made to oscillate on the surface of moon

A
Increases

B
Decreases

C
Remains unchanged

D
Becomes infinite

Solution
Question 10
4 / -1

A simple pendulum is attached to the roof of a lift. If time period of oscillation, when the lift is stationary is T. Then frequency of oscillation, when the lift falls freely, will be

A
Zero

B
T

C
1/T

D
None of these

Solution