Expalin why it is preferable to use a number of graphite electrodes as anode instead of a single electrode during the electrolysis of aluminium

Expalin why it is preferable to use a number of graphite electrodes as

1.	Expalin why it is preferable to use a number of graphite electrodes as anode instead of a single electrode during the electrolysis of aluminium
Answer» It RESULTS in BETTER COATING of ALUMINIUM.