Топик: Методические указания по английскому языку

The discovery in 1820 that there was a close connection between electricity and magnetism was very exciting -until then, the two subjects had been considered as quite independent. The first discovery was that currents in wires make magnetic fields; then in the same year, it was found that wires carrying current in a magnetic field have forces on them. In 1840 Faraday discovered - electric effects exist only when there is something changing. If one of a pair of wires has a carrying current, a current is induced in the other, or if a magnet is moved near an electric circuit, there is a current. We say that currents are induced.

2. Переведите слова и словосочетания:

Discovery, magnetic induction, wires, magnetic fields, current, electric effects, induced, an electric circuit, connection, electricity and magnetism.

3. Переведите предложения:

1) Electricity and magnetism subjects had been considered as quite independent subjects.

2) If currents make magnetic fields, people suggested that magnets might also make electric fields.

4. Выбрать правильный вариант:

For the atom to be electrically neutral, the number of protons must be....... to that of

electrons.

a) more b) equal c) less

5. Выбрать правильный вариант:

We know Isaac Newton to express the connection between........ and motion in the form

of several laws.

a) electricity b) current c) force

6. Выбрать правильный вариант:

Before Faraday's discovery the only usable source of........ was the galvanic battery.

a) electricity b) magnetism c) conduction

7. Закончить предложение:

Artificial magnets may be made by placing.........

a) a magnet to be magnetised into a battery

b) a piece of iron or steel to be magnetised into a coil

8. Закончить предложение:

Faraday wanted to produce electricity by.........

a) Electromagnetism b) electric circuit

9. Составить предложение:

Was, carrying, a, have, them, discovery, that, current, magnetic, forces, the, wires, in, field, on.

10. Составить предложение:

A, electricity, and, had, as, was, between, magnetism, subjects, considered, independent, there, connection, and, these, been, quite.

Вариант 6