# Oscillations and Waves (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 116 - 120 of 195

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## Question number: 116

» Oscillations and Waves » Displacement Relation for a Progressive Wave

MCQ▾

### Question

The relation between time and displacement for two particles is given by

and .

The ratio of the intensities of the waves produced by the vibrations of the two particles will be

### Choices

Choice (4) Response

a.

2: 1

b.

4: 1

c.

1: 2

d.

1: 4

## Question number: 117

» Oscillations and Waves » Simple Harmonic Motion » Phase

MCQ▾

### Question

The composition of two simple harmonic motions of equal periods at right angle to each other and with a phase difference of results in the displacement of the particle along,

### Choices

Choice (4) Response

a.

Figure of 8

b.

Circle

c.

Straight line

d.

Ellipse

## Question number: 118

» Oscillations and Waves » Periodic Motion - Period Frequency

Assertion-Reason▾

### Assertion (Ꭺ)

The periodic time of a hard spring is less compared to that of a soft spring.

### Reason (Ꭱ)

The periodic time depends upon the spring - constant, and spring constant is large for hard spring.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

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

d.

Ꭺ is true but Ꭱ is false

## Question number: 119

» Oscillations and Waves » Simple Pendulum

MCQ▾

### 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: 120

» Oscillations and Waves » Simple Pendulum

MCQ▾

### 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

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