Oscillations and Waves (KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 4 - 7 of 27

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Question number: 4

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

Appeared in Year: 2011

MCQ▾

Question

At 230C, a pipe open at both ends resonates at a frequency of 450 hertz. At what frequency does the same pipe resonate on a hot day when the speed of sound is 4 percent higher than it would be at 230C?

Choices

Choice (4) Response

a.

454 Hz

b.

446 Hz

c.

459 Hz

d.

468 Hz

Question number: 5

» Oscillations and Waves » Doppler Effect in Sound

Appeared in Year: 2011

MCQ▾

Question

A speaker emits a sound wave of frequency f0. When it moves towards a stationary observer with speed u, the observer measures a frequency f1. If the speaker is stationary, and the observer moves towards it with speed v, the measured frequency is f2. Then –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 6

» Oscillations and Waves » Doppler Effect in Sound

Appeared in Year: 2010

MCQ▾

Question

A bus driving along at 39.6 km/h is approaching a person who is standing at the bus stop, while honking repeatedly at an interval of 30 seconds. If the speed of the sound is 330 m/s, at what interval will the person hear the horn?

Choices

Choice (4) Response

a.

29 seconds

b.

31 seconds

c.

30 seconds

d.

The interval will depend on the distance of the bus from the passenger

Question number: 7

» Oscillations and Waves » Periodic Motion - Period Frequency

Appeared in Year: 2010

MCQ▾

Question

A bead of mass m is attached to the mid-point of a taut, weightless string of length l and placed on a frictionless horizontal table.

 A bead of mass m is attached to the mid-point of a taut

a Bead of Mass M Is Attached to the Mid-Point of a Taut

In figure a bead of mass m is attached to the mid-point of a taut, weightless string of length l and placed on a frictionless horizontal table.

Under a small transverse displacement x, as shown, if the tension in the string is T, then the frequency of oscillation is –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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