Exercise 1

Question 6 :

Nuclear sizes are expressed in a unit named


A). Fermi
B). angstrom
C). newton
D). tesla
Answer : Option A

Explanation :

Fermi - A unit of length equal to 10-15 meter (one femtometer), used in nuclear physics. It is similar to the diameter of a proton.


Question 7 :

Light year is a unit of


A). time
B). distance
C). light
D). intensity of light
Answer : Option B

Question 8 :

Mirage is due to


A). unequal heating of different parts of the atmosphere
B). magnetic disturbances in the atmosphere
C). depletion of ozone layer in the atmosphere
D). equal heating of different parts of the atmosphere
Answer : Option A

Question 9 :

Light from the Sun reaches us in nearly


A). 2 minutes
B). 4 minutes
C). 8 minutes
D). 16 minutes
Answer : Option C

Question 10 :

Stars appears to move from east to west because


A). all stars move from east to west
B). the earth rotates from west to east
C). the earth rotates from east to west
D). the background of the stars moves from west to east
Answer : Option B