解题思路:
:
(
1)
∵
100
W
=
0.1
kW
,
电灯消耗的电能
W
=
P
t
=
0.1
kW
×
1
h
=
0.1
kW
⋅
h
=
3.6
×
10
5
J
,
(2)根据电能表参数知:指示灯闪烁一次消耗的电能为
kW
⋅
h
,
又电灯
1
h
消耗的电能是:
0.1
kW
⋅
h
,
∴
指示灯闪烁的次数为
=
300
imp
.
3.6×105;300.
<>
解题思路:
:
(
1)
∵
100
W
=
0.1
kW
,
电灯消耗的电能
W
=
P
t
=
0.1
kW
×
1
h
=
0.1
kW
⋅
h
=
3.6
×
10
5
J
,
(2)根据电能表参数知:指示灯闪烁一次消耗的电能为
kW
⋅
h
,
又电灯
1
h
消耗的电能是:
0.1
kW
⋅
h
,
∴
指示灯闪烁的次数为
=
300
imp
.
3.6×105;300.
<>