Some electricity is present (7)
I believe the answer is:
current
I believe this is a double definition.
'some electricity' is the first definition.
(current electricity is a kind of electricity)
'is present' is the second definition.
('current' can be similar in meaning to 'present')
(Other definitions for current that I've seen before include "Flow of electricity" , "Source of power" , "Popular" , "unlike these pieces" , "In general use; flow" .)