Oscillations and WavesSimple Pendulum (NEET (NTANational Eligibility cum Medical Entrance Test) Physics): Questions 19  23 of 28
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Question number: 19
» Oscillations and Waves » Simple Pendulum
Question
The length of a simple pendulum is 2 m. The spherical bob which is empty from inside has a mass of 50 gm. This is now replaced by another solid bob of same radius but having different mass of 100 gm. The new time period will be,
Choices
Choice (4)  Response  

a.  4 sec 

b.  2 sec 

c.  1 sec 

d.  8 sec 

Question number: 20
» Oscillations and Waves » Simple Pendulum
Question
A pendulum suspended from the ceiling of a train has a period T, when the train is at rest. When the train is accelerating with a uniform acceleration a, the period of oscillation will,
Choices
Choice (4)  Response  

a.  Increase 

b.  Become infinite 

c.  Remain unaffected 

d.  Decrease 

Question number: 21
» Oscillations and Waves » Simple Pendulum
Question
At any instant of time the displacement of a simple pendulum is 0.08 m and acceleration is 2 m/sec ^{2}; the angular velocity will be:
Choices
Choice (4)  Response  

a.  10 radian/sec 

b.  5 radian/sec 

c.  4 radian/sec 

d.  0.1 radian/sec 

Question number: 22
» Oscillations and Waves » Simple Pendulum
Question
A simple pendulum is executing simple harmonic motion with a time period . If the length of the pendulum is increased by 21%, the percentage increase in the time period of the pendulum of is,
Choices
Choice (4)  Response  

a.  10% 

b.  21% 

c.  30% 

d.  50% 

Question number: 23
» Oscillations and Waves » Simple Pendulum
Question
Identify wrong statements among the following,
(1) The greater the mass of a pendulum bob, the shorter is its frequency of oscillation
(2) 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 ^{0}.
(3) As the length of a simple pendulum is increased, the maximum velocity of its bob during its oscillation will also increase.
(4) The fractional change in the time period of a pendulum on changing the temperature is independent of the length of the pendulum.
Select the correct answers and mark it according to the following codes:
Choices
Choice (4)  Response  

a.  2 and 4 are correct 

b.  1 and 2 are correct 

c.  1, 2 and 3 are correct 

d.  1 and 3 are correct 
