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7. Solve these problems:

1. Suppose that you have four electric cells. The current capacity of each cell equals l.5 amp, the voltage output equals 2 V.

a) Connect the cells in series. In what way should it be done?

b) Connect the battery to a circuit whose resistance value equals 15 ohms. What is the value of current in the circuit?

2. Suppose that you have three cells of the same value.

a) Connect them in parallel. In what way should it be done?

b) Connect the second battery to the same circuit: what will it result in?

Suppose that one of the cells stops operating. What should be done in this case?

Unit Ten [10]

1. A) Cover the right column and read the English words. Translate them into Russian and check your translation.

b) Cover the left column and translate the Russian words back into English.

capacitor

[kəˈpæsɪtə]

конденсатор

insulator

[ˈɪnsjuleɪtə]

изолятор

frequency

[ˈfriːkwənsi]

частота

distance

[ˈdɪstəns]

расстояние

advantage

[ədˈvɑːntɪdʒ]

преимущество

disadvantage

недостаток

plate

анод (лампы)

part

[pɑːt]

часть

to apply

[əˈplaɪ]

прилагать, применять

to move

[muːv]

двигать(ся)

to prevent

предотвращать

reason

причина

for this reason

по этой причине

besides

кроме того

provided that

при условии что

2. Translate into Russian and write down the Russian equivalents. Then translate the Russian variants back into English (orally).

a. paper insulators

_____________________________

air insulators

_____________________________

electrolyte capacitors

_____________________________

advantages of electrolyte capacitors

_____________________________

disadvantages of air insulators

_____________________________

b. cells under test

_____________________________

capacitors in common use nowadays

_____________________________

radio sets under test

_____________________________

PC in common use nowadays

_____________________________

c. a radioman

_____________________________

radio work

_____________________________

radio parts

_____________________________

telephone and radio work

_____________________________

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