In the context of accuracy to measurement and significant figures in expressing results of experiment, which of the following is/are correct? (1) Out of the measurements 50.14 cm and 0.00025 ampere, the first one has greater accuracy. (2) If one travels 478 km by rail and 397 m. by road, the total distance traveled is 478 km.
None of these is correct.
Only (1) is correct
Only (2) is correct
Both are correct
A
Only (1) is correct
B
Both are correct
C
Only (2) is correct
D
None of these is correct.
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Solution
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Significant figures are the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value. We start counting significant figures at the first non-zero digit.
Since for 50.14cm
Now, the significant number=4
and for 0.00025
Significant number =2
Both are correct
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