Oscillations and Waves (NEET (NTA-National Eligibility cum Medical Entrance Test) Physics): Questions 151 - 155 of 195

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Question number: 151

» Oscillations and Waves » Displacement Relation for a Progressive Wave

MCQ▾

Question

The equation of a progressive wave is given by Equation where x and y are in meter and t is in second. The velocity of the wave is,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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Passage

A particle performs linear SHM such that it is placed on platform-1 & platform-2 along with particles up and down with amplitude A = 8 cm. If the particle does not loose contact with platform anywhere and mass of particle is 2 kg, find:

Question number: 152 (1 of 1 Based on Passage) Show Passage

» Oscillations and Waves » Periodic Functions

MCQ▾

Question

The minimum, possible time period (Take Equation )

Choices

Choice (4) Response

a.

0.1 sec.

b.

0.2 sec.

c.

0.4 sec.

d.

0.3 sec.

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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

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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.

Equation

b.

Equation

c.

Equation

d.

Equation

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Question number: 155

» Oscillations and Waves » Reflection of Waves

Assertion-Reason▾

Assertion (Ꭺ)

Velocity of particles, while crossing mean position (in stationary waves) varies from maximum at antinodes to zero at nodes.

Reason (Ꭱ)

Amplitude of vibration at antinodes is maximum and at nodes, the amplitude is zero, and all particles between two successive nodes cross the mean position together.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

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

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