Oscillations and Waves (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 139  143 of 195
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Question number: 139
» Oscillations and Waves » Wave Motion
Question
A wave of frequency 500 Hz has velocity 360 m/sec. The distance between two nearest points 60° out of phase, is
Choices
Choice (4)  Response  

a.  12 cm 

b.  60 cm 

c.  120 cm 

d.  0.6 cm 

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Question number: 140
» Oscillations and Waves » Simple Pendulum
Question
The length of a second’s pendulum is 7 m. The spherical bob which is empty from inside has a mass of 150 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.  4.43 sec 

b.  2.38 sec 

c.  5.30 sec 

d.  4 sec 

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Question number: 141
» Oscillations and Waves » Periodic Functions
Question
The motion of a particle is expressed by the equation , where a is the acceleration, X is the distance from the equilibrium position and b is a constant. The periodic time will be:
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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Question number: 142
» 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.  Remain unaffected 

b.  Decrease 

c.  Become infinite 

d.  Increase 

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Question number: 143
» Oscillations and Waves » Longitudinal and Transverse Waves
Question
Assertion (Ꭺ)
Transverse waves are not produced in liquids and gases.
Reason (Ꭱ)
Light waves are transverse waves.
Choices
Choice (4)  Response  

a.  Ꭺ is false but Ꭱ is true 

b.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ 

c.  Both Ꭺ and Ꭱ are false 

d.  Ꭺ is true but Ꭱ is false 

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