Physics Past Questions and Answers

the speed of light in vacuum is 3.0 x 108ms-1. If the refractive index of a transparent liquid is \(\frac{4}{3}\), then the speed of light in the liquid is

A 0.44 x 10 8ms-1
B 2.25 x 10 8ms-1
C 3.0 x 10 8ms-1
D 4.0 x 10 8ms-1
E 4.33 x 10 8ms-1

Question 272:

If the force of a charge of 0.2 coulomb in an electric field is 4N, then the electric field intensity of the field is

A 0.8
B 0.8N/C
C 20.0N/C
D 4.2N/C
E 20.0N/C

Question 273:

The specific latent heat of vaporization of a substance is always

A Less than its specific latent heat of fusion
B Greater than its specific heat of fusion
C Equal to its specific latent heat of fusion
D All of the above depending on the nature of the substance
E None of the above

Question 274:

Longitudinal waves do not exhibit

A Refraction
B Reflection
C Diffraction
D Polarization
E Rarefaction

Question 275:

Which of the following may be used to determine the relative humidity in a physics laboratory I. Manometer II. Wet-and-Dry Bulb Hygrometer III. Hair Hygrometer IV. A Hydrometer

A I Only
B II and III Only
C II Only
D III Only
E II,IIIand IV Only