
电与磁 中考物理

Quiz
•
Physics
•
9th - 12th Grade
•
Hard

Vicky Liu
Used 6+ times
FREE Resource
24 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
电流所做的功叫作电功。电流做了多少功,就有多少电能通过用电器转化为其他形式的能量。电功的公式:
W=IU
W=IUt
W=IR
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
电功的单位
J
W
kWh
kW
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
电功率:表示电流做功快慢的物理量,公式:
P=W/t
P=IU
P=IR
P=UR
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
电流的热效应:由于导体有电阻,所以当电流通过时,导体会发热,电能转化为内能。焦耳定律:导体通电时放出的热量,计算公式:
Q=IUR
Q=I2Rt
Q=IUt
Q=U2Rt
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
家庭电路的组成:___、____、____、____开关、插座、用电器等
进户线
电能表
总开关
熔断器
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
对人体来说,安全电压:
36V
34V
一般不高于36V
一般不高于34V
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
磁体周围存在____。
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