The reactions e(-) p --> Delta(0) nu(e) and e(+) p --> Delta(++) <(upsilon)
over bar>(e) are considered as a possible source of information about the w
eak N Delta transition form factors. The low q(2) BNL data on nu(mu) produc
tion of a are used to extract the axial vector N Delta coupling, taking int
o account the deuteron structure and the Delta width. Finally, pion product
ion induced by neutrinos in O-16 in the Delta region, relevant to atmospher
ic nu experiments, is investigated.