Thread: Percentage error

Hi,

so I have been set a question to find a percentage error of an experiement. But it looks like to me I have not been told all the information I need? I may well be mistaken here.

The formula I have been given is:

Percent error = (Experimental value - theoretical value) / (theoretical value) x 100%

Then the question set is:

An electric current might be meassured as (2.0 + or - 0.02) amperes.

The symbol for amperes is A.

This means the error is + or - 0.02 A, and the true current is somewhere between
(2.0 - 0.02) A and (2.0 + 0.02) A
It lies between 1.98 A and 2.02 A

Calculate the percentage error in this instance?

I can't work out which bits I substitute into the formula.

Make sense to anyone?

.02/2=.01=1 percent

That was the conclusion I originally came to, but wasn't sure if it was right. Thanks!

It's right.