AIIMS Physics: Questions 352 - 355 of 500

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Question number: 352

» Kinetic Theory of Gases » Kinetic Theory of Gases

MCQ▾

Question

For an ideal gas at 330 K temperature, the average translation energy of molecules is 7.02×1021J , and the rms speed if molecules is 520ms . Find the corresponding value at temperature 650K ,

Choices

Choice (4) Response
a.

14.4×1021Jand700ms

b.

13.8×1021Jand730ms

c.

21.6×1021Jand680ms

d.

15.0×1021Jand680ms

Question number: 353

» Experimental Skills » Speed of Sound in Air

MCQ▾

Question

The velocity of sound in air at 00C is 330ms . At what temperature its velocity will be half?

Choices

Choice (4) Response
a.

204.75

b.

819

c.

204.75

d.

819

Question number: 354

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

Question

A vehicle, with a horn of frequency n is moving with a velocity of 45ms in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n+n1 . Then – (Take velocity of sound in air 300 m/s)

Choices

Choice (4) Response
a.

n1=13n

b.

n1=0.13n

c.

n1=0

d.

n1=1.3n

Question number: 355

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

Question

A siren emitting sound of frequency 750 Hz is going away form a static listener with a speed of 40msec . The frequency of sound to be heard directly from the siren is –

Choices

Choice (4) Response
a.

530 Hz

b.

669 Hz

c.

489 Hz

d.

344 Hz

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