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2. Transform one part of speech into another and translate them into Russian.

Прилагательное, существительное + ize\ise = глагол

Special – специальный – specialize – специализированный

Computer, ideal, crystal, central.

Префикс over – (сверх -, пере-)

To heat – нагревать – to overheat – перегревать

Production, active, grow, estimate.

3. Find synonymous.

Exist, path, amount, resistance, circuit, unit, device, be present, force, opposition, overcome, quantity, strength, surmount, mechanism, unity.

4. Read and translate the text.

There exist three basic electrical units in any electrical circuit: ampere, ohm and volt.

The ampere is an electrical unit for measuring the strength of electric current in a circuit. One ampere represents the amount of cur­rent generated by 1 volt acting through the resistance of 1 ohm. For mea­suring the intensity of an electric current in amperes a device called ammeter is used.

The ohm is an electrical unit for measuring the resistance or op­position to the flow of current. One ohm represents such a resistance that a one-volt addition to the potential produces 1 ampere of current. The device used for measuring resistance is called ohmmeter.

The volt is an electrical unit measuring the external force applied to a circuit to overcome the opposition to the flow of current. This force is called voltage and is also referred to as electromotive force or elec­tric pressure. The electromotive force that causes a current of 1 ampere to flow through a resistance of 1 ohm equals 1 volt. The device used for measuring voltage is called voltmeter.

One more important unit of electrical measurement is the watt - the unit of power: the power of 1 ampere of current pushed by one volt of electromotive force. Devices used for measuring delivery of electrical energy in watts are called wattmeter and watthourmeter.

5. Answer the questions.

    1. What is ampere?

    2. What does one ampere represent?

    3. What device is used for measuring the intensity of electric cur­rent?

    4. What is resistance measured in?

    5. What does 1 ohm represent?

    6. What is ohmmeter used for?

    7. How is the external force applied to a circuit to overcome the resistance measured?

    8. What does 1 volt equal?

    9. How is the power of electric current measured?

        1. Make up sentences using substitution tables.

A

The ampere for measuring the external force applied to a circuit to .

overcome the opposition op­position to the flow of current.

is an electrical unit

The volt for measuring the amount of power per unit of time.

The ohm for measuring the resistance or op­position to the flow of current.

The watt for measuring the strength of electric current in a circuit.

B

The ammeter used for measuring voltage.

The voltmeter is used for mea­suring the intensity of an electric current.

The ohmmeter for measuring delivery of electrical energy

The watthourmeter for measuring resistance.

        1. Fill in the gaps with necessary words and word combinations.

1. There exist three basic electrical _____ in any electrical _____: ampere, ohm and volt.

2. One ampere represents the amount of cur­rent generated by _____acting through the resistance of _____.

3. One ohm represents such _____ that a one-volt addition to the potential produces ____ .

4. The electromotive force that causes a current of _____to flow through a resistance of _____ equals _____.

5. The power of _____of current is pushed by _____ of electromotive force.

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