Oscillations and Waves-Longitudinal and Transverse Waves (NEET Physics): Questions 1 - 5 of 8

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Passage

Sound from a point isotropic source spreads equally in all directions in homogeneous medium. Therefore its intensity decreases with square of distance from the source. When distance between observer and the source changes, apart from changes in intensity, the observer listens sound of pitch higher or lower than actual pitch depending upon the fact that the distance between the observer and source is decreasing or increasing respectively. An observer O is at a distance 2R from center of a circle of radius R. A point isotropic sound source S moves on the circle with uniform angular velocity Equation . Initially observer, source and Centre of the circle are in same line.

Isotropic sphere of radius R.

Isotropic Sphere of Radius R.

In above fig we shows that Sound from a point isotropic source spreads equally in all directions in homogeneous medium

Question number: 1 (1 of 1 Based on Passage) Show Passage

» Oscillations and Waves » Longitudinal and Transverse Waves

MCQ▾

Question

Sound emitted by the source at two successive instants t 1 and t 2 has minimum and maximum observed pitch respectively, then -

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 2

» Oscillations and Waves » Longitudinal and Transverse Waves

MCQ▾

Question

In a sinusoidal wave, the time required for a particular point to move from maximum displacement to zero displacement is 0.130 second. The frequency of the wave is,

Choices

Choice (4) Response

a.

2.47 Hz

b.

1.785 Hz

c.

1.73 Hz

d.

1.92 Hz

Question number: 3

» Oscillations and Waves » Longitudinal and Transverse Waves

MCQ▾

Question

In a sinusoidal wave, the time required for a particular point to move from maximum displacement to zero displacement is 0.170 second. The frequency of the wave is,

Choices

Choice (4) Response

a.

0.36 Hz

b.

0.73 Hz

c.

1.47Hz

d.

2.94 Hz

Question number: 4

» Oscillations and Waves » Longitudinal and Transverse Waves

MCQ▾

Question

In a sinusoidal wave, the time required for a particular point to move from maximum displacement to zero displacement is 0.125 second. The frequency of the wave is,

Choices

Choice (4) Response

a.

2.0 Hz

b.

1.47 Hz

c.

0.73 Hz

d.

2.94 Hz

Question number: 5

» Oscillations and Waves » Longitudinal and Transverse Waves

Assertion-Reason▾

Assertion (Ꭺ)

Particle velocity and wave velocity both are independent of time.

Reason (Ꭱ)

For the propagation of wave motion in medium, the medium must have the properties of elasticity and inertia.

Choices

Choice (4) Response

a.

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

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are false

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