解题思路:
3000
r
/
kW
⋅
h
表示的是接入这个电能表的电路中每消耗
1
kW
⋅
h
的电能,电能表的转盘转
3000
r
,或者表示电能表每转
1
r
,电路中消耗
kW
⋅
h
的电能,电路中消耗电能:
W
=
kW
⋅
h
=
kW
⋅
h
=
"
0.006
"
k
W
⋅
h
=
21600
J
,用电器功率:
P
=
W
/
t
=
21600
J
/360
s
=
60
W
。
60 6×10‐³ 2.16 ×10 4
<>
解题思路:
3000
r
/
kW
⋅
h
表示的是接入这个电能表的电路中每消耗
1
kW
⋅
h
的电能,电能表的转盘转
3000
r
,或者表示电能表每转
1
r
,电路中消耗
kW
⋅
h
的电能,电路中消耗电能:
W
=
kW
⋅
h
=
kW
⋅
h
=
"
0.006
"
k
W
⋅
h
=
21600
J
,用电器功率:
P
=
W
/
t
=
21600
J
/360
s
=
60
W
。
60 6×10‐³ 2.16 ×10 4
<>