Oscillations and Waves (NEET Physics): Questions 151 - 154 of 192

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Question number: 151

» Oscillations and Waves » Displacement Relation for a Progressive Wave

MCQ▾

Question

A wave travelling in positive X-direction with A = 1.2 m has a velocity of 240 m/sec. If λ = 40 m, then correct expression for the wave is

Choices

Choice (4) Response

a.

y=1.2sin[2π(6t+x40)]

b.

y=1.2sin[2π(6tx40)]

c.

y=1.2sin[π(6t+x40)]

d.

y=1.2sin[π(6tx40)]

Question number: 152

» Oscillations and Waves » Displacement Relation for a Progressive Wave

MCQ▾

Question

The equation of a progressive wave is given by y=0.5sin(20x400t) where x and y are in meter and t is in second. The velocity of the wave is,

Choices

Choice (4) Response

a.

200ms

b.

20ms

c.

400ms

d.

10ms

Question number: 153

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

Question

Doppler shift in frequency depends upon

Choices

Choice (4) Response

a.

The velocity of the observer

b.

The frequency of the wave produced

c.

The velocity of the source

d.

All c. , a. and b. are correct

Question number: 154

» Oscillations and Waves » Standing Waves in Strings and Organ Pipes

MCQ▾

Question

An open organ pipe is in resonance in its 2 nd harmonic with tuning fork of frequency f 1 now; it is closed at one end. If the frequency of the tuning fork is increased slowly from f l then again a resonance is obtained with a frequency f 2. If in this case the pipe vibrates n th harmonics then

Choices

Choice (4) Response

a.

n=3,f2=34f1

b.

n=5,f2=54f1

c.

n=5,f2=34f1

d.

n=3,f2=54f1

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