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Physics Past Questions and Answers

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Physics Questions

Question 1481:

The small droplet of water that forms on the grass in the early hours of the morning is

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A Hail
B Dew
C Fog
D Mist

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Question 1482:

A vapour is said to be saturated when

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A A dynamic equilibrium exists between liquid molecules and the vapour molecules
B A dynamic aquilibrium exists such that more molecules return to the liquid than are living it
C The temperature of the vapour varies
D The vapour pressure is atmospheric

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Question 1483:

The pressure of one mole of an ideal gas of volume 10<sup style='font-size: smaller;'>-2</sup> m<sup style='font-size: smaller;'>3</sup> at a temperature of 27°c is <br/>[molar gas constant = 8.3 J mol<sup style='font-size: smaller;'>-1</sup> k<sup style='font-size: smaller;'>-1</sup>]

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A 2.49 x 10<sup style='font-size: smaller;'>4</sup> Nm<sup style='font-size: smaller;'>-2</sup>
B 2.24 x 10<sup style='font-size: smaller;'>4</sup> Nm<sup style='font-size: smaller;'>-2</sup>
C 2.49 x 10<sup style='font-size: smaller;'>5</sup> Nm<sup style='font-size: smaller;'>-1</sup>
D 2.24 x 10<sup style='font-size: smaller;'>5</sup> Nm<sup style='font-size: smaller;'>-1</sup>

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Question 1484:

Which of the following has no effect on radiation?

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A Nature of surface
B Density
C Surface area
D Temperature

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Question 1485:

The wavelength of a wave traveling with a velocity of 420 ms<sup style='font-size: smaller;'>-1</sup> is 42 m. what is its period?

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A 1.2 s
B 1.0 s
C 0.5 s
D 0.1 s

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