Loading...
UPSC 1999: 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:
(a)I-B, II-A, III-C, IV-D
(b)I-A, II-B, III-D, IV-C
(c)I-A, II-B, III-C, IV-D
(d)I-B, II-A, III-D, IV-C
Attempt This Question
Not attemptedCorrect Answer: (c) I-A, II-B, III-C, IV-D
High speeds of aircraft are expressed as a Mach number (ratio to speed of sound) ([en.wikipedia.org](https://en.wikipedia.org/wiki/Mach_number?utm_source=openai)); wavelength is often quoted in ångströms ([en.wikipedia.org](https://en.wikipedia.org/wiki/Angstrom?utm_source=openai)); the SI unit of pressure is the pascal ([en.wikipedia.org](https://en.wikipedia.org/wiki/Pascal_%28unit%29?utm_source=openai)); and the SI unit of energy is the joule ([en.wikipedia.org](https://en.wikipedia.org/wiki/Joule?utm_source=openai)). Therefore the correct pairing is I-A, II-B, III-C, IV-D, i.e. option (c).
Related Current Affairs
Related UPSC Questions
More from Physics
1999easy
Endoscopy, a technique used to explore the stomach or other inner parts of the body is based on the phenomenon of
1999easy
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 w
1998easy
A fuse is used in main electric supply as a safety device. Which one of the following statements about the fuse is correct?
Frequently Asked Questions
What is the correct answer to this UPSC 1999 Science & Technology question?▼
The correct answer is option (c): I-A, II-B, III-C, IV-D. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Physics question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1999, GS Paper 1, as Question 113. It falls under Science & Technology > Physics.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Physics?▼
UPSC has asked 104 questions from Physics (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.