AIIMS (All India Institute of Medical Sciences) Physics: Questions 422 - 426 of 500

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Question number: 422

» Properties of Solids & Liquids » Pressure Due to a Fluid Column

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Question

A common hydrometer, which is graduated from 0 to 10 downwards, reads zero when floating in water and 10 when floating in liquid of specific gravity 1.4. In an unknown liquid it reads 7, the specific gravity of the unknown liquid is –

Choices

Choice (4)Response

a.

1.4

b.

1.6

c.

1.2

d.

1.3

Question number: 423

» Ray Optics » Snell's Law

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What is the velocity of the light in the medium if and the velocity of light in a vacuum is ?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 424

» Rotational Motion » Concepts of Rotational Motion

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A stone tied to the end of 15 cm long string is whirled in a horizontal circle. If the centripetal acceleration is , its angular speed in is –

Choices

Choice (4)Response

a.

9

b.

c.

15

d.

8

Question number: 425

» Laws of Motion » Force and Inertia

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Question

A box is put on a scale which is adjusted to read zero, when the box is empty. A stream of pebbles is then poured into the base from a height above its bottom at a rate of pebbles per second. Each pebble has a mass If the pebbles collide with the box such that they immediately come to rest after collision, then the scale reading at time after the pebbles begin to fill the box is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 426

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

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Question

A string in a musical instrument is 60 cm long and its fundamental frequency is 800 Hz. If a frequency of 1200 Hz is to be produced, then required length of string is –

Choices

Choice (4)Response

a.

70 cm

b.

40 cm

c.

50 cm

d.

65 cm

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