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Significant Figures

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Q. How many significant figures are in the measurement 0.05060?
  • A. 3
  • B. 4
  • C. 5
  • D. 2
Q. How many significant figures are in the number 0.000500?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. How many significant figures are in the number 0.00456?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. How many significant figures are in the number 0.007890?
  • A. 3
  • B. 4
  • C. 5
  • D. 6
Q. How many significant figures are in the number 100.0?
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. How many significant figures are in the number 1002?
  • A. 2
  • B. 3
  • C. 4
  • D. 1
Q. How many significant figures are in the number 5000 when no decimal point is present?
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. How many significant figures are in the number 5000?
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. How should the number 0.0001234 be rounded to two significant figures?
  • A. 0.00012
  • B. 0.00013
  • C. 0.0001
  • D. 0.000123
Q. How should the number 0.05060 be rounded to three significant figures?
  • A. 0.051
  • B. 0.0506
  • C. 0.05060
  • D. 0.050
Q. If a length is measured as 0.0500 m, how many significant figures does it have?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. If a length is measured as 0.0600 m, how many significant figures does it have?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. If a length is measured as 150.0 cm, how many significant figures does it have?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. If a length is measured as 25.0 cm, what is the uncertainty in this measurement?
  • A. 0.1 cm
  • B. 0.01 cm
  • C. 1 cm
  • D. 0.5 cm
Q. If a measurement is recorded as 0.004560, how many significant figures does it have?
  • A. 3
  • B. 4
  • C. 5
  • D. 6
Q. If a measurement is recorded as 0.00780 m, how many significant figures does it have?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. If a measurement is recorded as 0.00780, how many significant figures does it contain?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. If a measurement is recorded as 0.007890, how many significant figures does it have?
  • A. 3
  • B. 4
  • C. 5
  • D. 6
Q. If a measurement is recorded as 1500 m, how many significant figures does it have?
  • A. 2
  • B. 3
  • C. 4
  • D. 1
Q. If a measurement is recorded as 1500 with no decimal point, how many significant figures does it have?
  • A. 2
  • B. 3
  • C. 4
  • D. 1
Q. If you add 12.11 and 0.3, how many decimal places should the answer have?
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. If you multiply 2.5 (2 significant figures) by 3.42 (3 significant figures), how many significant figures should the answer have?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. If you multiply 2.5 (2 significant figures) by 3.42 (3 significant figures), how many significant figures should the result have?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. In the calculation 12.11 + 0.3 + 1.234, how many significant figures should the answer have?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. In the expression 0.00450 + 0.0034, how many significant figures should the result have?
  • A. 3
  • B. 4
  • C. 5
  • D. 6
Q. In the measurement 0.007890, how many significant figures are present?
  • A. 3
  • B. 4
  • C. 5
  • D. 6
Q. In the measurement 0.03040, how many significant figures are present?
  • A. 3
  • B. 4
  • C. 5
  • D. 2
Q. In the measurement 123.45, how many significant figures are present?
  • A. 3
  • B. 4
  • C. 5
  • D. 6
Q. In the measurement 150.0, how many significant figures are present?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. In the measurement 2500 kg, how many significant figures are there?
  • A. 2
  • B. 3
  • C. 4
  • D. 1
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Significant Figures MCQ & Objective Questions

Understanding significant figures is crucial for students preparing for exams, as it directly impacts the accuracy of numerical answers. Practicing MCQs and objective questions on significant figures helps reinforce this concept, ensuring you can tackle important questions with confidence. By mastering significant figures, you enhance your exam preparation and improve your overall performance in both school and competitive exams.

What You Will Practise Here

  • Definition and importance of significant figures in scientific calculations.
  • Rules for determining significant figures in different types of numbers.
  • How to perform calculations involving significant figures, including addition, subtraction, multiplication, and division.
  • Common examples and practice questions to solidify your understanding.
  • Identifying significant figures in measurements and their implications.
  • Application of significant figures in real-world scenarios and experiments.
  • Tips and tricks for quickly identifying significant figures in MCQs.

Exam Relevance

Significant figures are a key topic in various examinations, including CBSE, State Boards, NEET, and JEE. Questions often focus on identifying significant figures in given numbers, performing calculations while maintaining the correct number of significant figures, and interpreting results in the context of scientific data. Familiarity with this topic can help you tackle both direct and application-based questions effectively.

Common Mistakes Students Make

  • Confusing leading zeros with significant figures, often miscounting them.
  • Neglecting to adjust the number of significant figures in calculations, leading to incorrect answers.
  • Overlooking the rules for significant figures in multiplication and division compared to addition and subtraction.
  • Failing to recognize that trailing zeros in a whole number without a decimal point are not significant.

FAQs

Question: What are significant figures?
Answer: Significant figures are the digits in a number that contribute to its precision, including all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Question: How do I determine the number of significant figures in a measurement?
Answer: Count all non-zero digits, any zeros between them, and any trailing zeros in a decimal number. Leading zeros are not counted.

Ready to enhance your understanding of significant figures? Dive into our practice MCQs and test your knowledge to ensure you are well-prepared for your exams!

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