Exercise 3

Question 16 :

Radiocarbon dating technique is used to estimate the age of


A). rocks
B). monuments
C). soil
D). fossils
Answer : Option D

Question 17 :

Identify the vector quantity from the following


A). Heat
B). Angular momentum
C). Time
D). Work
Answer : Option B

Question 18 :

Large astronomical telescopes always use as objective


A). lens
B). mirror
C). combinations of lenses
D). None of the above
Answer : Option C

Question 19 :

One should not connect a number of electrical appliances to the same power socket because


A). this can damage the appliances due to overloading
B). this can damage the domestic wiring due to overloading
C). this can damage the electrical meter
D). the appliance will not get full voltage
Answer : Option B

Question 20 :

Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this? Diffusion Refraction Internal reflection


A). I, II and III
B). I and II
C). II and III
D). I and III
Answer : Option C