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。反馈 收藏 ...
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。
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...
If a circuit has a resistance of 5 ohms and a current of 3 amperes, what is the voltage? A. 15 volts. B. 2 volts. C. 8 volts. D. 1.67 volts. 相关知识点: 试题来源: 解析 A。解析:根据欧姆定律公式 I = V/R,可得 V = IR = 3×5 = 15 伏特。
Understanding how to properly measure electrical resistance can help you diagnose problems with electrical systems and ensure their reliability and safety.
GND full form is ground. it is very commonly used in electrical engineering as a basic concept. It works as a reference point of voltage in circuits and protects the circuit and the person working the circuit. It is a common return path of current to a p
The primary is connected to a 120-V AC source and the secondary is connected to an electrical device with a resistance of 1000 ohms. 1. What will be the voltage output of the secondary? 2. What current flows in the secondary circuit? 3. What is the power in the secondary coil? 4...
Consider the circuit below. What is the equivalent resistance between pointsAandB? Equivalent Resistance Between Points: In the difficult circuit of resistors, we need to identify the positions of the resistors that they are connected in series or parallel. There are different for...
Semiconductor devices can display a range of useful properties, such as showing variable resistance, passing current more easily in one direction than the other, and reacting to light and heat. Their actual function includes the amplification of signals, switching, and energy conversion. ...
Consider the figure below. What is the equivalent resistance of the circuit? Equivalent Resistance: If a single resistor can be replaced in place of group of resistors in such that it does not vary the current flow inside the electrical circuit, then this resistor with some r...