Oscillations and Waves (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 125 - 129 of 195

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Question number: 125

» Oscillations and Waves » Simple Pendulum

MCQ▾

Question

The length of a simple pendulum is increased by 1%. Its time period will

Choices

Choice (4) Response

a.

Increase by 2%

b.

Increase by 0.5%

c.

Decrease by 0.5%

d.

Increase by 1%

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Question number: 126

» Oscillations and Waves » Simple Pendulum

MCQ▾

Question

A simple pendulum consisting of a ball of mass m tied to a thread of length l is made to swing on a circular arc of angle θ in a vertical plane. At the end of this arc, another ball of mass m is placed at rest. The momentum transferred to this ball at rest by the swinging ball is

Choices

Choice (4) Response

a.

1

b.

Equation

c.

Zero

d.

Equation

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Question number: 127

» Oscillations and Waves » Speed of a Wave

Assertion-Reason▾

Assertion (Ꭺ)

Sound travels faster during a clear sunny day than during a clear night.

Reason (Ꭱ)

The velocity of sound is directly proportional to the square of temperature of the medium.

Choices

Choice (4) Response

a.

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

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are false

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Question number: 128

» Oscillations and Waves » Simple Harmonic Motion » Energy

MCQ▾

Question

A loaded vertical spring executes simple harmonic oscillation with period of 4 s. The difference between the kinetic energy and potential energy of this system oscillates with a period of:

Choices

Choice (4) Response

a.

8 s

b.

1 s

c.

4 s.

d.

2 s

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Question number: 129

» 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 Equation

(3) Q and R is Equation

(4) P and R is Equation

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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