3466: When a CD (Compact Disc used in audio and video systems) is seen in sunlight, rainbow like colours are seen. This can be explained on the basis of the phenomenon of
(a) reflection and diffraction
(b) reflection and transmission
(c) diffraction and transmission
(d) refraction, diffraction and transmission
3467: Given :
Humidity : H
High : A
Wind Velocity : W
Low : B
Temperature : T
The desert cooler is an appropriate cooling device for regions where
(a) HAWATB
(b) HBWBTA
(c) HAWBTB
(d) HAWATA
3468: Why is it advisable not to draw current for many appliances from a single point?
(a) Current will decrease
(b) Current will increase
(c) Current and voltage both will increase
(d) Voltage will decrease whereas current will increase
3469: The silver coins issued by the Guptas were called
(a) rupaka
(b) karshapana
(c) dinara
(d) pana
3470: Match List I with List II and select the correct answer using the codes given below the lists :
List I---------------------List II
I. Deccan Traps-------(A) Late Cenozoic
II. Western Ghats----(B) Pre-Cambrian
III. Aravalli-------------(C) Cretaceous-Eocene
IV. Narmada-Tapi-----(D) Cambrian Alluvial deposits
-------(E) Pleistocene
Codes:
(a) I-C, II-E, III-A, IV-D
(b) I-C, II-A, III-B, IV-E
(c) I-B, II-A, III-C, IV-D
(d) I-A, II-D, III-B, IV-E