In a meter bridge experiment, we try to obtain the null point at the middle. This reduces :
Systematic errors:
Errors that have the tendency to align in a particular direction, for example it can be positive or negative.
Random errors:
These errors are said to occur irregularly in experiments and need to be avoided.
In a meter bridge experiment when we try to obtain the null point there are more chances of systematic or random errors due to the heating effect of electric current or fall in emf of the cell that we are using in the circuit.
Hence, we always take the null point at the middle to reduce both systematic and random errors.
A physical quantity $$X$$ is represented by $$X = (M^x L^{-y}T^{-z})$$. The maximum percentage errors in the measurement of $$M, L$$ and $$T$$, respectively, are $$a\%, \ b\%$$ and $$c\%$$. The maximum percentage error in the measurement of $$X$$ will be:
The errors which are estimated by statistical methods are: