Read the text below to match the terms on the left with their definitions on the right.

Electric Circuits.

Alessandro Volta (1745-1827) Alessandro Volta invented the first battery, the voltaic pile, in 1800. The very first circuits used a battery and electrodes immersed in a container of water. The flow of current through the water produced hydrogen and oxygen. The invention of the battery -- which could produce a continuous flow of current -- made possible the development of the first electric circuits.

Their types and applications.

Active vocabulary

Intervention - втручання Thermistor - термістор Voltage - напруга Current - струм (потік) Accidental - випадковий Capacitor – конденсатор to establish - встановлювати

to conduct - проводити to cease - припиняти to insert - помістити to wrap - загортати to bypass - пропускати Junction - з'єднання Dim - неясний

Discussion

Think of the different types of electric circuits. What are the main differences they have?

What do they have in common?

Reading

Read the text below to match the terms on the left with their definitions on the right.

	Closed circuit	a	A circuit in which the components are connected in line with one another and the wire. This type of circuit does not contain any three or more wire junctions
	Open circuit	b	A circuit in which there are junctions of three or more wires. Components don’t "share» the same wire; instead each component has its own wire.
	Short circuit	c	This circuit consists of three elements: a source of electricity (battery), a path or conductor on which electricity flows (wire) and an electrical resistor (lamp)
	Series circuit	d	A faulty or accidental connection between two points of different potential in an electric circuit, bypassing the load and establishing a path of low resistance through which an excessive current can flow.
	Parallel circuit	e	An electric circuit providing an uninterrupted, endless path for the flow of current.
	Simple Circuit	f	An electric circuit in which the normal path of current has been interrupted, either by the disconnection of one part of its conducting pathway from another, or by the intervention of an electric component, such as a transistor.

Four parts of the Circuit Switch Energy Source Opens and closes Provides the “push makes current move around a circuit

Wires

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