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Fun Video: Rules for Significant Figures Video Lecture - JEE

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FAQs on Fun Video: Rules for Significant Figures Video Lecture - JEE

1. What are significant figures?
Ans. Significant figures are digits in a number that carry meaning and contribute to its precision. They include all the certain digits and the first uncertain digit in a measurement or calculation.
2. How do you determine the number of significant figures in a measurement?
Ans. To determine the number of significant figures in a measurement, you count all the certain digits and the first uncertain digit. Leading zeros are not significant, but zeros between nonzero digits and trailing zeros after a decimal point are significant.
3. What are the rules for rounding off numbers using significant figures?
Ans. The rules for rounding off numbers using significant figures are as follows: - If the digit to the right of the last significant figure is less than 5, the last significant figure remains unchanged. - If the digit to the right of the last significant figure is 5 or greater, the last significant figure is increased by 1. - If the digit to the right of the last significant figure is 5 and there are no more digits or only zeros after it, the last significant figure is rounded to the nearest even number.
4. Can you use significant figures in calculations?
Ans. Yes, significant figures are used in calculations. The result of a calculation should have the same number of significant figures as the measurement with the fewest significant figures involved in the calculation.
5. How do you handle addition and subtraction with significant figures?
Ans. When performing addition or subtraction with significant figures, the result should be rounded to the same number of decimal places as the measurement with the fewest decimal places. The significant figures are not taken into account in these operations, only the decimal places.
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