Is it possible to force a relay to toggle without changing the input to the coil? i.e. if the relay (a sealed SPDT, say) has 0V on the coil such that NC is connected, it is theoretically possible that a REALLY HUGE magnetic field could force the contact to the NO position.
How likely is this is a typical environment? Are there any relays which quote this theoretical value?
Are there any other ways this condition could be forced (or reversed)?