A loudspeaker changes _________ energy into sound energy
(A) Chemical
(B) Electrical
(C) Light
(D) Kinetic
The strongest part(s) of a magnet is/are _________
(A) North pole
(B) South pole
(C) North and south pole
(D) Median of north and south pole
The major ingredient of leather is__________________
(A) Collagen
(B) Polymer
(C) Nucleic acid
(D) None of these
Glass is made of the mixture of______________
(A) Quartz and Mica
(B) Sand and Salt
(C) Sand and Silicates
(D) None of these
Rusting of Iron involves_______________
(A) Reduction
(B) Oxidation
(C) Decomposition
(D) Displacement
How long does the earth take to cover 1° longitude
(A) 2 Minutes
(B) 3 Minutes
(C) 4 Minutes
(D) 5 Minutes
Microphone converts sound energy into ___________
(A) Microwaves
(B) Electrical signals
(C) Optical Signals
(D) Heat energy
1 BTU(British thermal unit) is equal to___________
(A) 955 joules
(B) 990 joules
(C) 1055 joules
(D) 1211 joules