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Three students measured length of a needle with meter rod and recorded as :
(i) 0.2145m
(ii) 0.21m
(iii) 0.214m
Which one is correct record?
(i) 0.2145m
(ii) 0.21m
(iii) 0.214m
Which one is correct record?
- a)Both (i) and (ii)
- b)Only (iii)
- c)Only (ii)
- d)Only (i)
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Three students measured length of a needle with meter rod and recorded...
The correct answer is C.
Only the measurement (ii) is accurate because:
- A meter rod typically measures up to two decimal points.
- Measurements (i) and (iii) exceed this precision.
Thus, the only valid record is 0.21m.
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Community Answer
Three students measured length of a needle with meter rod and recorded...
Understanding Significant Figures
When measuring, it's crucial to understand significant figures to determine how precise a measurement is. Each measurement should reflect the accuracy of the instrument used.
Analysis of Each Measurement
- (i) 0.2145 m
- This measurement has four significant figures. It suggests a high precision, implying the instrument can measure to the nearest 0.0001 m.
- (ii) 0.21 m
- This measurement has only three significant figures. However, it suggests a lower precision, indicating that the measurement is rounded and does not reflect finer detail.
- (iii) 0.214 m
- This measurement has three significant figures, which indicates a reasonable level of precision, but it is not as precise as (i).
Correctness of Records
- The accuracy of the measurements depends on how the meter rod was used.
- The significant figures indicate that (i) is the most precise, while (ii) is the least precise but still valid.
- However, for practical purposes in contexts like scientific examinations, the precision of the measurement is paramount.
Conclusion
Given the rules of significant figures, the correct record among the options provided is:
- Only (ii) 0.21 m, as it reflects a valid measurement with appropriate rounding for the context.
Thus, the correct answer is option 'C': Only (ii).
When measuring, it's crucial to understand significant figures to determine how precise a measurement is. Each measurement should reflect the accuracy of the instrument used.
Analysis of Each Measurement
- (i) 0.2145 m
- This measurement has four significant figures. It suggests a high precision, implying the instrument can measure to the nearest 0.0001 m.
- (ii) 0.21 m
- This measurement has only three significant figures. However, it suggests a lower precision, indicating that the measurement is rounded and does not reflect finer detail.
- (iii) 0.214 m
- This measurement has three significant figures, which indicates a reasonable level of precision, but it is not as precise as (i).
Correctness of Records
- The accuracy of the measurements depends on how the meter rod was used.
- The significant figures indicate that (i) is the most precise, while (ii) is the least precise but still valid.
- However, for practical purposes in contexts like scientific examinations, the precision of the measurement is paramount.
Conclusion
Given the rules of significant figures, the correct record among the options provided is:
- Only (ii) 0.21 m, as it reflects a valid measurement with appropriate rounding for the context.
Thus, the correct answer is option 'C': Only (ii).
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Three students measured length of a needle with meter rod and recorded as :(i) 0.2145m(ii) 0.21m(iii) 0.214mWhich one is correct record?a)Both (i) and (ii)b)Only (iii)c)Only (ii)d)Only (i)Correct answer is option 'C'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Three students measured length of a needle with meter rod and recorded as :(i) 0.2145m(ii) 0.21m(iii) 0.214mWhich one is correct record?a)Both (i) and (ii)b)Only (iii)c)Only (ii)d)Only (i)Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Three students measured length of a needle with meter rod and recorded as :(i) 0.2145m(ii) 0.21m(iii) 0.214mWhich one is correct record?a)Both (i) and (ii)b)Only (iii)c)Only (ii)d)Only (i)Correct answer is option 'C'. Can you explain this answer?.
Three students measured length of a needle with meter rod and recorded as :(i) 0.2145m(ii) 0.21m(iii) 0.214mWhich one is correct record?a)Both (i) and (ii)b)Only (iii)c)Only (ii)d)Only (i)Correct answer is option 'C'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Three students measured length of a needle with meter rod and recorded as :(i) 0.2145m(ii) 0.21m(iii) 0.214mWhich one is correct record?a)Both (i) and (ii)b)Only (iii)c)Only (ii)d)Only (i)Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Three students measured length of a needle with meter rod and recorded as :(i) 0.2145m(ii) 0.21m(iii) 0.214mWhich one is correct record?a)Both (i) and (ii)b)Only (iii)c)Only (ii)d)Only (i)Correct answer is option 'C'. Can you explain this answer?.
Solutions for Three students measured length of a needle with meter rod and recorded as :(i) 0.2145m(ii) 0.21m(iii) 0.214mWhich one is correct record?a)Both (i) and (ii)b)Only (iii)c)Only (ii)d)Only (i)Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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Three students measured length of a needle with meter rod and recorded as :(i) 0.2145m(ii) 0.21m(iii) 0.214mWhich one is correct record?a)Both (i) and (ii)b)Only (iii)c)Only (ii)d)Only (i)Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Three students measured length of a needle with meter rod and recorded as :(i) 0.2145m(ii) 0.21m(iii) 0.214mWhich one is correct record?a)Both (i) and (ii)b)Only (iii)c)Only (ii)d)Only (i)Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Three students measured length of a needle with meter rod and recorded as :(i) 0.2145m(ii) 0.21m(iii) 0.214mWhich one is correct record?a)Both (i) and (ii)b)Only (iii)c)Only (ii)d)Only (i)Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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