Physics Past Questions and Answers

0.5kg of water at 10^oC is completely converted to ice by extracting 188000J of heat from it. If the specific heat capacity of water is 4200J kg^-1C^-1, calculate the specific latent heat of fusion of ice.

A 9.0 KJ kg^-1
B 84.0 KJ kg^-1
C 168.0 KJ kg^-1
D 334.0 KJ kg^-1
E 336.0 KJ kg^-1

Question 37:

The temperature at which the water vapour present in the air is just sufficient to saturate it is called the

A Ice point
B Boiling point
C Steam point
D Dew point
E Saturation point

Question 38:

Which of the following instrument may be used to measure the relative humidity?

A Hydrometer
B Barometer
C Manometer
D Hypsometer
E Hygrometer

Question 39:

Which of the following will affect the saturation vapour pressure of a liquid?

A Temperature of the liquid
B Humidity of air
C Volume of vapour
D Volume of the liquid
E Mass of the liquid

Question 40:

Which of the following statements is/are not correct about image formed by a plane mirror?
I. The magnification produced is 1
II. The image distance is same as the object distance
III. The image is real
IV. The image is laterally inverted

A I only
B II only
C III only
D I & II only
E II & IV only