What is the function of a battery in a circuit? A. To provide resistance. B. To measure current. C. To provide voltage. D. To measure resistance. 相关知识点: 试题来源: 解析 C。解析:电池在电路中的作用是提供电压。选项 A 提供电阻错误;选项 B 测量电流错误;选项 D 测量电阻错误。
What acts as conductors in a circuit? A. The load. B. The power source. C. The wires. D. The E. lectrons. 相关知识点: 试题来源: 解析 C。中文解析:文中明确指出“The wires act as conductors to carry the electric current from the power source to the load.”,即电线作为导体。
C. It decreases as more resistors are added. D. It varies randomly. 相关知识点: 试题来源: 解析 A。解析:在串联电路中,电流处处相等。B 选项错误,增加电阻电流会减小;C 选项错误,不是增加电阻电流就减小;D 选项错误,不是随机变化。本题考查串联电路中电流的特点以及英语中“series circuit”的含义。
Passage 070Circuit Do you have any ide a what a circuit is? It is a road where electricity flows. How can you light a with two wires? First, you need one wire to connect one end of the aand the bulb. And you connect the other end of the battery and the bulb with another wir ...
11.what type of electrical circuit is created when a fuse blowsa) A closed circuitb)A bypass circuitc)An open circuitd)A short circuit2.what does 60 hertzs (hz) mean?a)6000 cycles per secondb)60 cycles per secondc)6000 meters per secondd)60 meter per second3.what is the minimum ...
1【题目】Circuit电路Do you have any idea what a circuit is? It is a road where electricityflows. How can you light a bulb with two wires? First, you need one wire toconnect one end of the battery and the bulb. And you connect the other endof the battery and the bulb with another...
In a circuit, if the current decreases and the resistance remains constant, what happens to the voltage? A. It increases. B. It decreases. C. It remains the same. 相关知识点: 试题来源: 解析 B。根据欧姆定律,电阻不变,电流减小,电压也会减小。
A. It is different through each component. B. It is the same through each component. C. It is zero through each component. D. It is random through E. ach component. 相关知识点: 试题来源: 解析 B。解析:文中提到“In a series circuit, the total resistance is the sum of the indivi...
A. To increase the voltage. B. To decrease the current. C. To increase the current. D. To change the direction of the current. 相关知识点: 试题来源: 解析 B。解析:在简单电路中,电阻器的作用是减小电流。电阻器不能增加电压,也不能增加电流,更不能改变电流方向。反馈...
However ,over the past 12months, those commuters have alsoexperienced some of the worst rail strikes in years .Itis all very welltrain operators trumpeting the improvements the are making to thenetwork .but passengers should be able to expect a basic level ofservice for the substantial sums they...