Instrument used for measuring very high temperature is:
A. Pyroscope
B. Pyrometer
C. Seismograph
D. Xylometer
Sound waves are ___ waves.
A. Transverse
B. Electromagnetic
C. Longitudinal
D. none of these
When white light is passed through a prism, it splits into ___ colors.
A. 5
B. 6
C. 7
D. 8
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
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