# Oscillations and Waves [NEST (National Entrance Screening Test) Physics]: Questions 1 - 3 of 3

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## Question number: 1

» Oscillations and Waves » Simple Harmonic Motion » Energy

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Appeared in Year: 2014

MCQ▾

### Question

Consider two identical masses attached to identical spring as shown in figure. They can be set in motion in two different ways as follows:

Here, and denoted the displacements from the unstretched positions. Then the potential energy stored in the system is

### Choices

Choice (4)Response

a.

Smaller for than at

b.

Larger for than at

c.

Equal for than at

d.

Larger for than at

## Question number: 2

» Oscillations and Waves » Speed of a Wave

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Appeared in Year: 2019

Essay Question▾

### Describe in Detail

Two bodies of equal mass are suspended from two rigid supports by separate massless springs having spring constants and respectively. If the bodies oscillate vertically such that equal, the ratio of amplitude of oscillations of to that of is

### Explanation

Since maximum velocity

and

Taking ratio

Given

## Question number: 3

» Oscillations and Waves » Standing Waves in Strings and Organ Pipes

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Appeared in Year: 2019

Essay Question▾

### Describe in Detail

Consider a thermal ensemble at temperature which is composed of identiced quantum harmonic oscillator of frequency with non – overlapping wave function, the probability that there will be an even number of energy in the system is

### Explanation

Probability

For even energy quanta

Otherwise

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