Question P2.WE.3: The resistance of a resistor is given as 47 ±5 Ω. The value ...

Step 1 Calculate the logarithm of the given value:
ln (R/Ω) = ln 47 = 3.85
Step 2 Calculate the logarithm of the maximum likely value:
maximum likely value = 47 + 5 = 52 Ω
ln 52 = 3.95
Step 3 The uncertainty is the difference between the two logarithms:
uncertainty in ln R = 3.95 − 3.85 = 0.10
Thus ln (R/Ω) = 3.85 ±0.10