Oscillations and Waves (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 138 - 142 of 195

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Question number: 138

» Oscillations and Waves » Displacement Relation for a Progressive Wave

MCQ▾

Question

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

Equation , Equation

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

Choices

Choice (4) Response

a.

1: 9

b.

9: 1

c.

1: 2

d.

2: 1

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Question number: 139

» Oscillations and Waves » Reflection of Waves

Assertion-Reason▾

Assertion (Ꭺ)

Sound from a tuning fork is louder when its stem is placed on a desktop

Reason (Ꭱ)

When a wave reaches another denser medium some part of it is reflected.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is true but Ꭱ is false

d.

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

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Question number: 140

» Oscillations and Waves » Wave Motion

MCQ▾

Question

A wave of frequency 500 Hz has velocity 360 m/sec. The distance between two nearest points 60° out of phase, is

Choices

Choice (4) Response

a.

12 cm

b.

60 cm

c.

120 cm

d.

0.6 cm

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Question number: 141

» Oscillations and Waves » Simple Pendulum

MCQ▾

Question

The length of a second’s pendulum is 7 m. The spherical bob which is empty from inside has a mass of 150 gm. This is now replaced by another solid bob of same radius but having different mass of 100 gm. The new time period will be

Choices

Choice (4) Response

a.

4.43 sec

b.

2.38 sec

c.

5.30 sec

d.

4 sec

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Question number: 142

» Oscillations and Waves » Periodic Functions

MCQ▾

Question

The motion of a particle is expressed by the equation Equation , where a is the acceleration, X is the distance from the equilibrium position and b is a constant. The periodic time will be:

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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