Oscillations and Waves (NEET Physics): Questions 128 - 130 of 192

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Question number: 128

» Oscillations and Waves » Speed of a Wave

MCQ▾

Question

P, Q and R are three particles of a medium which lie on the x-axis. A sine wave of wavelength λ is travelling through the medium in the x -direction. P and R always have the same speed, while P and Q always have the same velocity. The minimum distance between –

(1) P and R is λ

(2) P and Q is λ2

(3) Q and R is λ2

(4) P and R is λ2

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

Question number: 129

» Oscillations and Waves » Free Forced and Damped Oscillations

Assertion-Reason▾

Assertion (Ꭺ)

Damping decreases the time period of oscillation of a simple pendulum.

Reason (Ꭱ)

Damped oscillation implies loss of energy.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

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

c.

Ꭺ is false but Ꭱ is true

d.

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

Question number: 130

» Oscillations and Waves » Longitudinal and Transverse Waves

MCQ▾

Question

Equation of motion in the same direction is given by y1=Asin(ωtkx) , y2=Asin(ωtkxθ) . The amplitude of the resultant particle will be,

Choices

Choice (4) Response

a.

2Acosθ

b.

2Acosθ2

c.

2Acosθ2

d.

2Acosθ

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