BITSAT (Birla Institute of Technology & Science Admission Test) Physics: Questions 332 - 337 of 382

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Question 332

Question

MCQ▾

A source and an observer move away from each other, with a velocity of with respect to ground. If the observer finds the frequency of sound coming from the source as . Then actual frequency of the source is, (velocity of sound in air ) –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 333

Question

MCQ▾

If the coefficient of cubical expansion is times of the coefficient of superficial expansion, then value of is –

Choices

Choice (4)Response

a.

2

b.

3

c.

1.5

d.

2.5

Question 334

Question

MCQ▾

The mass of two substance are and respectively. If their kinetic energies are same then their ratio of their moment is –

Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

Question 335

Question

MCQ▾

How much force is required to produce an increase of in the length of a brass wire of diameter ? (Young՚s modulus for brass )

Choices

Choice (4)Response

a.

Nearly

b.

Nearly

c.

Nearly

d.

Nearly

Question 336

Question

MCQ▾

A man fires a bullet standing between two cliffs. First echo heard after 3 second and second echo is heard after . If the velocity of sound is . Then the distance between cliffs is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 337

Question

MCQ▾

The maximum energy in the thermal radiation from a heat source occurs at a wavelength of . According to Wein՚s displacement law, the temperature of this source will be times. The temperature of another source for which the wavelength at maximum energy is . Then the value of is –

Choices

Choice (4)Response

a.

1

b.

4

c.

d.

2

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