Free Measurements MCQs with Answers
262 Measurements MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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262 questions · page 27 of 27
261. The SI unit of pressure is.
- A. Pascal
- B. mmHg
- C. torr
- D. atm
Explanation: The Pascal (Pa) is the SI unit of pressure, defined as one newton per square meter (N/m²). It is a measure of the force applied per unit area.
Correct answer: Pascal262. Mercury is 13.6 times as dense as water.
- A. Qualitative
- B. Quantitative
- C. Both A and B
- D. None of these
Explanation: The statement carries both kinds of information at once. It is qualitative in saying mercury is denser than water, and quantitative in fixing that comparison at a measured factor of 13.6. A purely qualitative statement would name the property without attaching any number to it.
Correct answer: Both A and B