解题思路:
①消耗电能为:
W
=
W
1
−
W
2
=
951.6
kW
⋅
h
−
811.6
kW
⋅
h
=
140
kW
⋅
h
,
②
∵
U
=
220
V
,
I
=
10
A
,
∴
使用的用电器总功率不得超过;
P
=
U
I
=
220
V
×
10
A
=
2200
W
,
140;2200.
解题思路:
①消耗电能为:
W
=
W
1
−
W
2
=
951.6
kW
⋅
h
−
811.6
kW
⋅
h
=
140
kW
⋅
h
,
②
∵
U
=
220
V
,
I
=
10
A
,
∴
使用的用电器总功率不得超过;
P
=
U
I
=
220
V
×
10
A
=
2200
W
,
140;2200.