# Oscillations and Waves (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 65 - 69 of 195

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## Question number: 65

» Oscillations and Waves » Simple Pendulum

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 66

» Oscillations and Waves » Simple Harmonic Motion » Oscillations of a Spring

MCQ▾

### Question

A simple pendulum has time period T 1. The point of suspension is now moved upward according to equation y = kt 2 where k = l m/sec 2. If new time period is T 2 then ratio will be

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 67

» Oscillations and Waves » Resonance

MCQ▾

### Question

Amplitude of a wave is represented by . Then resonance will occur when

### Choices

Choice (4) Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

## Question number: 68

» Oscillations and Waves » Simple Harmonic Motion » Phase

Assertion-Reason▾

### Assertion (Ꭺ)

In simple harmonic motion, the velocity is maximum, when acceleration is minimum.

### Reason (Ꭱ)

Displacement and velocity of S. H. M. differ in phase by

### Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

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

## Question number: 69

» Oscillations and Waves » Simple Pendulum

Assertion-Reason▾

### Assertion (Ꭺ)

The percentage change in time period is 1.5 % if the length of simple pendulum increases by 3

### Reason (Ꭱ)

Time period is directly proportional to length of pendulum

### Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

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

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