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An electrical circuit is a device that uses electricity to perform a task, such as run a vacuum or power a lamp.(электронная цепь это устройство, использующее электричество для исполненья задач, таких как) The circuit is a closed loop formed by a power source, wires, a fuse, a load, and a switch. Electricity flows through the circuit and is delivered to the object it is powering, such as the vacuum motor or lightbulb, after which the electricity is sent back to the original source; this return of electricity enables the circuit to keep the electricity current flowing. Three types of electrical circuits exist: the series circuit, the parallel circuit, and the series-parallel circuit; depending on the circuit type, it may be possible for electricity to continue flowing should a circuit stop working.

Types of Circuits
A series circuit is the simplest because it has only one possible path that the electrical current may flow; if the electrical circuit is broken, none of the load devices will work. The difference with parallel circuits is that they contain more than one path for electricity to flow, so if one of the paths is broken, the other paths will continue to work. A series-parallel circuit, however, is a combination of the first two: it attaches some of the loads to a series circuit and others to parallel circuits. If the series circuit breaks, none of the loads will function, but if one of the parallel circuits breaks, that parallel circuit and the series circuit will stop working, while the other parallel circuits will continue to work.
Решить задачку
Draw a diagram of a circuit consisting of two resistors and two capacitors
connected in parallel. A battery of four cells is applied to the circuit.
Two ammeters are used: one is connected to the main line, the other - to a
parallel branch.

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