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AIIMS (All India Institute of Medical Sciences) Physics: Questions 350 - 355 of 500

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Question 350

Question

MCQ▾

The Young՚s modulus of a rubber string 10 cm long and density , is , is suspended on the ceiling in a room. The increase in length due to its own weight will be:

Choices

Choice (4)Response

a.

b.

c.

d.

Question 351

Question

MCQ▾

In short wave communication waves of which of the following frequencies will be reflected back by the ionosphere layer having electron density 1018 per m3?

Choices

Choice (4)Response

a.

12 GHz

b.

15 GHz

c.

3 GHz

d.

9 GHz

Question 352

Question

MCQ▾

For an ideal gas at 330 K temperature, the average translation energy of molecules is , and the rms speed if molecules is . Find the corresponding value at temperature ,

Choices

Choice (4)Response

a.

b.

c.

d.

Question 353

Question

MCQ▾

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

Choices

Choice (4)Response

a.

b.

c.

d.

Question 354

Question

MCQ▾

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

Choices

Choice (4)Response

a.

b.

c.

d.

Question 355

Question

MCQ▾

A siren emitting sound of frequency 750 Hz is going away form a static listener with a speed of . 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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