Task № 6.Translate sentences into English

        1. Электрическимизмерительнымприборомназываетсяустройстводляизмеренияразличныхэлектрическихвеличин. –Anelectricalmeasuringdeviceiscalledadeviceformeasuringvarious electrical quantities.

    2. Поназначениюэлектроизмерительныеприборыклассифицируютсянаприборыдляизмерениятока, приборыдляизмерениянапряжения, приборыдляизмеренияэлектрическоймощности, приборыдляизмеренияэлектроэнергии, приборыдляизмеренияэлектрическогосопротивленияиприборыдляизмерениядругихвеличин. – Byappointment, electricalappliancesareclassifiedintocurrentmeasuringdevices, voltagemeasuringinstruments, electricpowermeters, electricalresistancemeasuringdevices and other measurement devices.

    3. Попринципудействияэлектроизмерительныеприборыподразделяютсянамагнитоэлектрические, электромагнитные, тепловые, индукционные, электростатическиеивибрационныеидругие. – According to the principle of operation, electrical measuring instruments are divided into magnetoelectric, electromagnetic, thermal, induction, electrostatic and vibration, and others.

    4. Приборы, предназначенныедляизмерениятока, этоамперметрыимиллиамперметры. –Devices intended for measuring current are ammeters and milliammeters.

    5. Счетчикиэлектрическойэнергииявляютсяприборамидляизмеренияэлектрическойэнергии. – Electricity meters are devices for measuring electrical energy.

    6. Электроизмерительныеприборыбываютпереносныеищитовые. – Electric measuring devices are portable and panel.

    7. Магнитоэлектрическиеприборыпригоднытолькодляизмерениясилытокаинапряжениявцепяхпостоянноготока. – Magnetoelectric devices are suitable only for measuring the current and voltage in DC circuits.

    8. Электромагнитныеприборыиспользуютсядляизмерениякакпостоянного, такипеременноготока. – Electromagnetic devices are used to measure both direct and alternating current.

    9. Электродинамическиеприборымогутизмерятьпостоянныйипеременныйток. – Electrodynamic devices can measure both direct and alternating current.

    10. Дляизмерениябольшихпеременныхтоковибольшихпеременныхнапряженийпользуютсяизмерительнымитрансформаторами. – Measuring transformers are used to measure large alternating currents and large alternating voltages.

    11. Сопротивлениетогоилииногоучасткацепиможноопределитьприпомощиамперметраивольтметра. – The resistance of this or that part of the circuit can be determined by means of an ammeter and a voltmeter.

    12. Электродинамическиеприборымогутобеспечитьвысокуюточностьпоказаний. – Electrodynamic devices can provide high accuracy of indications.

Task № 8.Find in the text the English equivalents to the following word combinations

1. Старениебатарей – the aging of batteries

2. Омметр делитель напряжения – voltage-dividerohmmeter

3. Внутреннийисточникэнергии – internalsourceofpower

4. Стрелкаприбора – the meter pointer

5. Отклонениестрелки – the meter pointer deflection

6. Корректорнуля – zero-ohmcontrol

7. Эффективнаявыходнаямощность – effectivevoltageoutput

8. Шкалакалибруется – the scale is calibrated

9. Максимальноесопротивление – maximum resistance

10. Омметршунтовоготипа – shunt-type ohmmeter

11. Показывать бесконечность – indicatesinfinity

12. Считывать показания тока – toreadcurrent

13. Реостат соединяется последовательно – arheostatisplacedinseries

14. Сериесныйомметр – series- typeohmmeter

15. Показывать нуль – indicates zero

Task № 9. Define if the following statements are true or false (in the written form)

1. Ammeters measure voltage. – No, ammeters measure current.

2. Voltmeters measure resistance. – No, voltmeters measure voltage.

3. Ohmmeters measure current. – Yes, ohmmeters measure current in relation to voltage or resistance in ohms.

4. The scale is calibrated to read current. – Yes, the scale is calibrated to read current in relation to voltage or resistance in ohms.

5. There are three types of ohmmeters. – Yes, there are basic types of ohmmeters: 1) simple series-type ohmmeter; 2) shunt-type ohmmeter; 3) voltage-divider ohmmeter.

6. The ohmmeter consists of a battery, a scale, a pointer and a rheostat. –Yes,all ohmmeters have on internal source of power (usually a battery), a scale, a pointer and a rheostat.

7. The rheostat is connected with the meter in series. – True. A rheostat is placed in series with the meter.

8. The function of the rheostat is to compensate the bad operation of a battery. – True. To compensate for the aging of batteries, a rheostat is placed in series with the meter.

9. At maximum resistance the meter indicates zero. – No, an ohmmeter indicates zero when there is no resistance.

10.  Ohmmeters operate on Ohm’s law. – Yes. The basic principle of an ohmmeter is: a known voltage, supplied by a battery is applied to an unknown resistance and the current is measured.

Task № 10. Complete the sentences using the text

1. An ohmmeter is used to measure resistance.

2. Ohmmeters operate with power supplied by the battery.

3. The scale has readings calibrated in ohms.

4. The meter pointer deflection measures resistance in relation to voltage.

5. The basic principle of an ohmmeter is according to Ohm’s law.

6. As a battery ages the effective voltage output of a meterdecreases.

7. A rheostat is placed in series with the meter to compensate the aging of a battery.

8. An ohmmeter indicates zero when there is no resistance.

9. Current decreases, as resistance increases in a shunt-type ohmmeter.

10.  In a shunt-type ohmmeter a resistor is connected to a meter in parallel.