11. Match the terms with their definitions:

1. A transistor is …

2. A diode is …

3. A capacitor is …

4. An insulator is …

5. An amplifier is …

6. The cathode ray tube is …

7. Television (TV) is …

8. A loudspeaker is …

a) … a vacuum tube containing an electron gun and a fluorescent screen.

b) … any device that changes the amplitude of a signal.

c) … a material that resists the flow of electric current.

d) … a passive electronic component consisting of a pair of conductors separated by an insulator.

e) … a two-terminal electronic component that conducts electric current in only one direction.

f) … a semiconductor device used to amplify and switch electronic signals.

g) … an electroacoustic transducer that produces sound in response to an

electrical audio signal input.

h) … a telecommunication medium for transmitting and receiving moving images that can be monochromatic or multicolored.

12. Find the Infinitive constructions in the following sentences and translate them into Ukrainian:

1. We know the ampere to represent the rate of electricity flow through the circuit.

2. Electric pressure or e.m.f. is measured in volts, causes electricity to flow.

3 .The two irons in question lie parallel to the axis of the coil, and assuming their permeabilities to be constant, the pole strength will be proportional to the current.

4. The only force which can make an electron move is that due to the fields of other electrons.

5. Above about 500 kilocycles it is difficult to make an arc develop appreciable negative resistance.

6 To make an electric current flow continuously along a wire, a continuous supply of electrons must be available at one end and a continuous supply of positive charges at the other.

7. The passage of current through a conductor of wire causes heat to be generated in it.

8. Heating causes a magnet to be demagnetized.

9. A compensator allows the motor, to take an excess current without putting a heavy overload on the mains.

10. A radio-transmitter is essentially a device for producing radio-frequency that is controlled by the intelligence to be transmitted.

11. We know water to flow with less resistance in a large pipe than in one of small section.

13. Choose the appropriate form of the Infinitive and translate the sentences into Ukrainian:

1. Some tests enable the voltage absorbed by the impedance of the winding to be determined / to have determined in addition to regulation.

2. If a current is passed through a coil of wire wound around a piece of iron, the latter will be found to be magnetized / to magnetize in a definite direction.

3. The magnetic field in the above case may be considered to be / to have been radial across the air gap.

4. Pure annealed copper is said to have / to have had 100 per cent conductivity.

5. Faster moving molecules meet oftener and being of higher energy content are more likely to react /to have been reacting on meeting.

6. If the amount of inductance and capacity are so small that their influence upon the current is negligible compared to the influence of the resistance the circuit may be considered to have / to have had nothing but resistance opposing the flow of current.

7. Copper and silver electrodes are certain to give /to be given a higher resistance gap than such metals as zinc, magnesium and so on.

8. The liquid particles seem to have /to have had a greater attraction for the solid than for their own molecules, this force of attraction between molecules of different kinds being called adhesion.

9. Having been rubbed many substances were proved to behave /to behaved as amber does.