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CBSE Notes for Class 11 Physics chapter Units and Measurement: significant figures, quick revision notes for Class 11 Physics chapter Units and Measurement significant figures, Chapter-wise CBSE Revision Notes, CBSE Notes PDF Free Download, CBSE One Liner Notes Class 11, Half Yearly Revision Notes, CBSE Revision Notes Class 11 Physics
Get CBSE Notes for Class 11 Physics Chapter Units and Measurement: significant figures prepared by experts as per the latest NCERT syllabus and CBSE exam pattern. These concise and easy-to-understand notes cover important definitions, formulas, diagrams, and key concepts from the chapter to help students in quick revision and effective exam preparation. Whether you are studying for school tests, board exams, or competitive exams, these notes provide a reliable study resource. Designed in simple language with point-wise explanations, they save time and enhance learning efficiency. Download free PDF notes, explore solved examples, and strengthen your understanding of [Topic Name] for scoring high marks. Perfect for Class 11 students who want clear, structured, and exam-oriented notes for CBSE Physics.
Rule for counting significant numbers
(2) In a whole number the zeros on the right side of the given number are non-significant.
45400 [significant number is 3]
(3) All the zeroes between two non –zeroes digit are significant.
Example: 21001 [significant number is 5]
200.0 --- significant number 3
(3) if the number is less than one the zero on right side of the decimal and to the left of non-zero digit are not significant.
0.00102 [significant number is 3]
0.000007 [significant number is 1]
2.00007 [significant number is 6]
Special rule
0.7 [significant number is 1]
0.70 [significant number is 2]
0.700 [significant number is 3]
Changing in unitary:
0.00003 = 3 × 10-5 [significant number is 1]
1.17 × 106 = [significant number is 3]
Accuracy indicates how close our measurement is to the true value.
Precision is measured by least count of the measuring instrument and it is indicated by number of significant figure in the value.
- Precising depends on significant number.
Example: if you have a wall clock having only hour and minutes hands and does not have second hand so it will not give précising measure.
It is necessary that accuracy has precision no it is possible that if precise observation may not be accurate.
Rounding the numbers by significant numbers.
If digit to be dropped is 5 or 5 followed by zero then précising digit will be increased by 1 and if it is odd. But there will be not changed if it will be even.
Actual Operation
Propagation of significant number in mathematical operation.
Addition and substraction
In result significant figure after decimal will be equal to minimum significant figures in any quantity that is added.
Example :
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Ace your exams with CBSE Notes for Class 11 Physics chapter Units and Measurement: significant figures. These notes provide a clear explanation of important concepts, formulas, diagrams, and solved examples from the NCERT syllabus. Specially designed for Class 11 students, the notes are structured in a simple, point-wise manner to make revision quick and effective. Whether you are preparing for school tests, board exams, or competitive exams, these Physics notes will boost your confidence and save valuable study time. You can also download Physics class 11 chapter Units and Measurement free PDF notes for offline learning. With easy-to-grasp language, exam tips, and well-organized content, these CBSE Physics notes on chapter Units and Measurement – significant figures are the perfect study companion for scoring high marks and mastering the subject.
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