I. Прочитайте текст и переведите его письменно.

MEASURING DEVICES

One of the first things that the engineer needs to know and to take into consideration is “how many”? How many amperes is this circuit carrying? What is the amount of the voltage that causes the current? How many ohms of resistance does the circuit offer?

Using Ohm’s Law and the law of the force of interaction between the magnet and the current, we can make very simple instruments to answer all three questions. To measure the current strength and the voltage is not difficult at all. All you have to do is to connect an amperemeter or a voltmeter in the circuit and then you can read off the amperes or the volts.

The amperemeter is known to be an instrument that is generally used to measure the current flowing in an electric circuit. In an amperemeter an armature coil rotates between the poles of a permanent magnet. The greater the current in the coil, the greater the force and the greater the angle of rotation of the armature. The deflection is measured by means of a pointer attached to the armature. The scale under the pointer is in amperes.

When the currents to be detected and measured are very small one should use a galvanometer. Some very sensitive galvanometers are reported to detect a current as small as 10^-11 of an ampere.

A voltmeter is an instrument to be used for measuring the potential difference between any two points in a circuit. Its action is similar to that of an amperemeter. The deflection is proportional to the current flowing through the armature coil. But according to Ohm’s Law, we know volts to equal amperes times ohms. Hence, the voltage is proportional to the current and the scale may be read directly in volts.

II. Определите какую функцию в предложении выполняет глагол to be и переведите предложение на русский язык. .( см. Образец выполнения 1)

The scale under the pointer is in amperes.

III.Найдите в тексте и выпишите одно предложение с глаголом to have. Определите его функцию. Предложение переведите.

IV.Найдите в тексте и выпишите одно предложение с глаголом to do. Определите его функцию. Предложение переведите.

V. Выпишите из третьего абзаца одно предложение в страдательном залоге. Определите время сказуемого. Предложение переведите.

VI. Переведите предложения, стоящие в страдательном залоге. Выпишите сказуемое и определите его время. ( см. образец выполнения 2 ).

1) Small currents will be detected by a galvanometer.

2) A voltmeter was used to measure the potential difference between two points in a circuit.

3) The scale is read in volts.

VII. Найдите в тексте и выпишите одно предложение с инфинитивом в функции части сказуемого (после модального глагола). Предложение переведите.

VIII.Определите функцию инфинитива в данном предложении и переведите его на русский язык.

To measure the current strength and voltage is not difficult at all.

IX.Найдите в тексте и выпишите два предложения с инфинитивным оборотом сложное подлежащее. Предложения переведите.

X.Переведите предложения, обращая внимание на сложное дополнение.

1) We know volts to equal amperes times ohms.

2) He considers ohms to be units of resistance.

XI.Ответьте письменно на вопрос по тексту.

How does amperemeter work?

XII.Вставьте в предложения данные слова.

1) The greater the … in the coil, the greater the … of rotation.

2) To measure the … is not difficult at all.

3) The … may be read directly in volts.

4) You should connect an … in the …

(voltage, angle, current, scale, circuit, amperemeter)

ВАРИАНТ5