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。反馈 收藏 ...
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...
A. A book, some pencils, and a ruler. B. A battery, some wires, and a bulb. C. A pen, some paper, and an eraser. D. A box, some stones, and a flower. 相关知识点: 试题来源: 解析 B。原因:文章中明确提到做简单电路实验需要一个电池、一些电线和一个灯泡。反馈...
A circuit is a road where flows. You always need to make a circuit. Without a, we cannot use electricity at all. 相关知识点: 试题来源: 解析 Passage 070 Circuit I . 1. wires 2. electricity 3. bulb 4. battery II . 1. Two. 2. Everywhere. electricity; wires; circuit 反馈 收藏 ...
A. They will keep on shining. B. They will become brighter. C. They will go out. D. Their brightness will decrease. 相关知识点: 试题来源: 解析 C。解析:在串联电路(series circuit)中,电流只有一条路径。如果一个灯泡烧坏了,电路就会断路,其他灯泡也会熄灭。A选项在串联电路中一个灯泡坏了其他灯...
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...
If the network contains no energy sources,such as batteries or electrical generators,it is known as a passive circuit
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 series circuit, if the resistance of one component increases, what happens to the total current in the circuit? A. Increases B. Decreases C. Remains the same D. Becomes zero 相关知识点: 试题来源: 解析 B。在串联电路中,总电阻等于各电阻之和。当一个电阻增大时,总电阻增大,根据欧姆定律...
In a series circuit, if one bulb burns out, what will happen to the other bulbs? A. They will become brighter. B. They will stay on. C. They will turn off. D. Their brightness will not change. 相关知识点: 试题来源: 解析 C。解析:在串联电路中,如果一个灯泡烧坏,整个电路断路,其他...