AIIMS Physics: Questions 386 - 390 of 500

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Question number: 386

» Gravitation » Gravitational Acceleration

MCQ▾

Question

If the radius of a planet is R and density of same planet is ρ , another planet having radius and density 2R and 3ρ respectively; then the ratio of accelerations due to gravity of these both planet is –

Choices

Choice (4) Response
a.

14

b.

16

c.

4

d.

6

Question number: 387

» Kinematics » Motion in a Straight Line

MCQ▾

Question

How far will a body free – fall in 2 second if released from rest?

Choices

Choice (4) Response
a.

0.0 m

b.

4.9 m

c.

9.8 m

d.

19.6 m

Question number: 388

» Properties of Solids & Liquids » Surface Energy and Surface Tension

MCQ▾

Question

A solid sphere of diameter D and density 8gcm3 has a spherical cavity of diameter d inside it. If it just floats completely immersed in a liquid of density 2gcm3 , then the ratio Dd is –

Choices

Choice (4) Response
a.

23

b.

233

c.

43

d.

433

Question number: 389

» Oscillations and Waves » Longitudinal and Transverse Waves

MCQ▾

Question

Find the magnitude of pressure amplitude in a sound of intensity 3×106Wm2 . Density of air at STP ρ=1.22kgm3,v=332ms .

Choices

Choice (4) Response
a.

4.2×102m

b.

6.3×102m

c.

5×102m

d.

7×102m

Question number: 390

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

Question

The vector A=ai^+aj^+15k^ and B=ai^j^2k^ are perpendicular to each other. The positive value of a is:

Choices

Choice (4) Response
a.

3

b.

5

c.

10

d.

6

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