CNG stands for?
A. Converted Natural Gas
B. Conduced Natural Gas
C. Conducted Natural Gas
D. Compressed Natural Gas
Which from the following is NOT a conductor?
A. Aluminium
B. Silicon
C. Graphite
D. All are conductors
A camera uses a _____ to form an image.
A. convex lens
B. concave lens
C. condenser lens
D. none of these
Which from the following is true for “Sound”?
A. Sound cannot travel through a vaccum
B. Sound cannot travel through gases
C. Sound cannot travel through liquids
D. Sound cannot travel through solids
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