①I 额=
P 额
U 额 =
1000w
220v ≈4.5A,∵I 实=4A,I 额=4.5A,∴I 实≠I 额,故答案为不能.
②R=
U 额 2
P 额 =
(220V) 2
1000w =48.4Ω,故答案为48.4Ω.
③P 实=I 实 2R=(4A) 2×48.4Ω=774.4W,故答案为774.4W.
①I 额=
P 额
U 额 =
1000w
220v ≈4.5A,∵I 实=4A,I 额=4.5A,∴I 实≠I 额,故答案为不能.
②R=
U 额 2
P 额 =
(220V) 2
1000w =48.4Ω,故答案为48.4Ω.
③P 实=I 实 2R=(4A) 2×48.4Ω=774.4W,故答案为774.4W.