UPSC 1999 › Science & Technology › Physics
7 questions · 1999 · answers as per the UPSC key
Consider the following
statement: An ordinary light bulb has a rather short life because the I. Filament wire is not uniform. II. Bulb cannot be evacuated completely. III. Wires supporting the filament melt at high temperatures.
Which of the above statements are correct?
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Match List I (Quantity) with List II (Units) and select the correct answer using the codes given below the Lists:
List I I. High speed II. Wavelength III. Pressure IV. Energy
List II A) Mach B) Angstrom C) Pascal D) Joule
Codes:
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Consider the following statements: I. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is. II. If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.
Which of the above statements is/are correct?
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Endoscopy, a technique used to explore the stomach or other inner parts of the body is based on the phenomenon of
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Strips of two metals A and B are firmly joined together as shown in the figure. On heating, A expands more than B does. If this joined strip is heated, then it will appear as:
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Low temperatures (Cryogenics) find application in
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A hunter aims his gun at a point between the eyebrows of a monkey sitting on a branch of a tree. Just as he fires, the monkey jumps down. The bullet will