Electric Cells

3.

Translate into Russian and put down the Russian equivalents. Then translate the Russian equivalents back into English (orally).

a. current capacity _______________________________

resistor temperature

voltage output current value

b. to start supplying energy
to stop operating

to start lightening

to stop lightening the bulbs

c. to operate well
to operate badly

to increase the voltage output to substitute the resistor

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Fig5

Cells can be connected in series, in parallel and in series-parallel. In order to increase the current capacity cells should be connected in parallel. In order to increase the voltage out­put cells should be connected in se­ries. In case a battery has a large current capacity and a large voltage output, its cells are connected in se­ries-parallel.

When cells are connected in series the positive terminal of one cell is connected to the negative terminal of the second cell, the positive terminal of the second cell - to the negative terminal of the third... and so on.

Fig. 7

Fig. 6

When cells are connected in parallel their negative terminals are connected together and their positive terminals are also connected.

4. Read and translate into Russian. Mind one:

1. The element has a trouble. It operates badly. It should be substituted by a new one.

2. The element with a trouble was substituted with a new one and the cell started operating.

An electric cell is used to produce and supply electric energy. It consists of an electrolyte and two electrodes. Electrodes are used as terminals, they connect the cell to the circuit - current passes through the terminals and the bulb lights.

In case a cell has a trouble it stops operating or operates badly. This cell should be substituted by another one.

5. Complete the sentences using the correct variant:

1. A cell is used

a) to increase the voltage output.

b) to reduce the current capacity.

c) to supply electric energy.

2. The terminals of a cell are used

d) to conduct current.

e) to increase voltage.

f) to connect the battery to a cir­cuit.

-ДЗ

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