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Question 30138
JEE Physics · Hard

Errors and Measurements: Error in Sum MCQ

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Error in SumHardQuestion 30138

Question

If X = A − B + C and ΔA = 0.2, ΔB = 0.3, ΔC = 0.1 (all in cm), then ΔX is:
  1. A
    0.4 cm
  2. B
    0.6 cm
    Correct
  3. C
    0.0 cm
  4. D
    0.2 cm

Correct answer

0.6 cm

Explanation

For any algebraic sum/difference, absolute errors always add: ΔX = ΔA + ΔB + ΔC = 0.2 + 0.3 + 0.1 = 0.6 cm.

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