问题
填空题
在电阻是5Ω的导体中,1.5min通过该导体的电量是45C,那么导体两端的电压是______V.
答案
通电时间:
t=1.5min=1.5×60s=90s,
通过电阻的电流:
I=
=Q t
=0.5A,45C 90s
根据欧姆定律可得,导体两端的电压:
U=IR=0.5A×5Ω=2.5V.
故答案为:2.5.
在电阻是5Ω的导体中,1.5min通过该导体的电量是45C,那么导体两端的电压是______V.
通电时间:
t=1.5min=1.5×60s=90s,
通过电阻的电流:
I=
=Q t
=0.5A,45C 90s
根据欧姆定律可得,导体两端的电压:
U=IR=0.5A×5Ω=2.5V.
故答案为:2.5.
阅读下面对话,从方框内7个选项中选择5个恰当的选项完成此对话,使其意思完整。 | |
(D=Daniel; L=Linda) D: Hello, Linda. Nice to meet you. L: Hello, Daniel. 1.______ D: You see, summer holiday is coming. 2.______ L: I'm going to travel to the Shanghai Expo Garden. D: 3.______ By the way, will you go there alone? L: 4.______ My cousin will go with me. D: 5.______. L: We'll start on July 8. D: I think you will enjoy yourselves there.
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