D. To change the direction of the current. 相关知识点: 试题来源: 解析 C。解析:保险丝在电路中的主要作用是防止过载。选项 A,保险丝不能增加电压。选项 B,测量电流的是电流表等仪器。选项 D,保险丝不能改变电流方向。阅读时要抓住“fuse”“electrical circuit”等关键词理解其在电路中的作用。
called terminals, which are attached to the ends of the fuse. The fuse is placed in a holder called a socket, which is mounted in the circuit breaker box. When the fuse blows, the metal wire inside the fuse melts, breaking the circuit and preventing...
Circuit breakers protect electrical circuits from damage caused by overcurrent, short circuits, or overload. They interrupt the flow of current when a fault occurs and restores it when the fault is cleared. Unlike afuse, which needs to be replaced after one operation, a circuit breaker can be...
What is a quantum wire? What is a semiconductor? What is analog VLSI? What is the SI unit for reactance? What is the current through the battery? What does a transformer do to AC voltage? What is a nominal current? What is the function of fuse or circuit breaker in a circuit?
A fuse is a type of electrical equipment that is used in an electrical circuit as a safety precaution. Usually, fuses protect all types of electrical equipment available in an electrical circuit from unnecessary electric currents. Fuses are normally made of a metal strip that melts when excessive...
An electric circuit is the pathway in which current can flow. It consists of electric devices, switching devices, source of electricity, etc. that are connected by conducting wires.
What are the factors on which resistance of a conductor depends? Why a... 02:44 Which material is best conductor? 01:28 Draw a schematic diagram of a circuit consisting of a battery of three... 02:27 Redraw the circuit of Q.12, putting in an ammeter to measure the curre... 05:06...
If a fuse is good or blown. If conductors are open or shorted. If switches are operating properly. If circuit paths are clear (accomplished by circuit or conductor tracing). Continuity testing should be attempted only when voltage is NOT present in the circuit being tested. ...
A residual current circuit breaker (RCCB) is an electrical safety device that detects and interrupts an electrical circuit when there is a leakage current to the ground. It protects people and equipment from electric shocks, fires, and other hazards caus
That’s why you throw a circuit breaker or blow a fuse when you plug in too many appliances at once. Still stuck? Instead of thinking about these as measurements of electricity, think of a river instead. The voltage of the river would be its orography, also known as the difference in ...