What is the role of fuse, used in series with any electrical appliance? Why should a fuse with defined rating not be replaced by one with a larger rating?

Explanation

The main role of used in series with any electrical appliance limits the current through the appliance. It protects the appliance due to to short-cicruiting or over/ loading as when current exceeds the limit for which the fuse is rated, it blows off and the appliance is disconnected from the electric supply.
When a fuse with defined rating for a particular is replaced by one with larger rating, it does not blow off and the appliance is damaged due to larger current passing through it .