First off, it is best to get the terms active active, active passive out of the mind set, while these are valid terms they are not nessesarily correct when looking at a cluster.

First off how many instances of SQL server are installed on the cluster? If 1 instance then you will always have 1 node not running, if multiple instances then depending where the instances are currently running from you could have 1 box running all the instances and the other will be stopped, or you could have instances running on all the nodes.