The diameter of a wire is measured by using a micrometer screw gauge with least count of 0.01 mm. Which of the following readings will be correct?
Correct answer: C. 2.00 mm
- A. 0.20 cm
- B. 0.002 m
- C. 2.00 mm
- D. 0.2 cm
Explanation
The following is the solution:Since least count is 0.01 mm, therefore, diameter must be expressed in multiples of 0.01.2.00 mm is 200 times 0.01 mm therefore, (C).
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Measurements
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.
Practise Measurements
262 free Measurements MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 11 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Measurements questions
Percentage uncertainty in length and width of a rectangle is 2% and 3%. The total uncertainty in the area of that rectangle is:
What is 1 radian in degrees approximately:
Molar mass of water is:
Force is a derived quantity, its derived unit can be expressed in terms of the base units as:
1 light year distance is the:
Which of the following is not a unit of energy?