Physics - Error Question with Solution | TestHub
Match the given numbers/calculations with their appropriate significant figures or rounded values.
List - I | List - II |
|---|---|
(P) Number of significant figures in 0.005070 | (1) 4 |
(Q) Number of significant figures in | (2) 3 |
(R) Result of (rounded to appropriate decimal places) | (3) 14.8 |
(S) Result of (rounded to appropriate significant figures) | (4) 3.1 |
Options:
Answer:
Solution:
For 0.005070, leading zeros are not significant, trailing zero after decimal is significant.
So, 5, 0, 7, 0 are significant (P-1). For , all digits in the mantissa are significant (Q-2). For addition, the result is rounded to the least number of decimal places: (R-3). For multiplication, the result is rounded to the least number of significant figures: . Since 2.5 has 2 significant figures, the result is 3.1 (S-4).
