Question

- A student calculates experimentally the value of
density of iron as 7.4gcm–³ . If the actual density
of iron is 7.6gcm–³, calculate the % error in the
experiment.
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Answer 1

First of all for this question, whenever we are proceeding our steps, we should just calculate the absolute error. On doing so, we can get the percentage error by using a formula :

Percentage error = (Absolute error/Actual value) × 100 %

Ultimately, your answer will be ready to you.


So, we will just proceed into our solution :

Absolute error = (7.6-7.4) g/cm³ = 0.2 g/cm³

So, percentage error = (Absolute error/Actual value) × 100 %

= (0.2/7.6) × 100 %

= 2.63% [ANSWER]

Answer 2

We can easily measure the absolute error from the above mentioned question.

Absolute error = (7.6-7.4) g/cm³ = 0.2 g/cm³

So, percentage error = (Absolute error/Actual value) × 100 %

= (0.2/7.6) × 100 %

= 2.63%