__Estimation or Calculation of Errors__

Get the notes of other chapters of class 11 Physics

__Absolute Error__

The absolute error in each measured value is the difference between true value (mean value) and that measured value.

Let the Measured values in an experiment are :

a1, a2, a3, a4, a5……...an

Then, mean or true value is

Here, amean is considered to be the true value.

Hence absolute error in each measured value is

∆a1 = am - a1

∆a2 = am - a2

∆a3 = am - a3

∆a4 = am - a4

∆a5 = am - a5

.

.

.

∆an = am - an

So, the Mean or Average of absolute errors is given by

Hence the true value can be written as

__Relative error __

It is the ratio of average absolute error to the true value of measured quantity.

It is also known as fractional error.

__Percentage error__

When the relative error is expressed in terms of percentage, then it is known as Percentage Error.

Get notes of class 11 Physics

## 0 Comments

If you have any doubt, please let me know. Leave a comment here...