Electrical and magnetic properties

 

" I have not failed, I've just found 10, 000 ways that won't work."

Thomas Edison

1. Запомните следующие слова и выражения:

reciprocal resistivity - взаимная сопротивляемость

deflect - отклонить

scatter - разгонять; рассеивать

atomic arrangement - расположение атомов

impurity atom - посторонний атом

grain boundaries - границы зерен

random oscillation of atoms - беспорядочное колебание атомов

induced by thermal energy вызванный тепловой энергией

thousandfold - тысячекратно

2. Соотнесите термины и определения:

1. Magnet	a) the temperature at which all atomic and molecular motion ceases.
2. Charge	b) the place on a magnet where the magnetic field is strongest
3. Current	c) the amount of electricity carried by a body (negative, positive)
4. Electro-magnet	d) a piece of iron or other material that attracts other pieces of iron or steel
5. Absolute zero	e) a wire coil around a metal core (usually iron) that acts like a magnet
6. Pole	f) a push or pull (gravitational, electromagnetic, strong nuclear and weak nuclear)
7. Resistance	g) movement of electricity, measured in charges per second.
8. Force	h) the property of a material that opposes the flow of an electric current.

3. Распределите слова по частям речи и переведите:

conductivity	reciprocal	movement	influence
particularly	perfection	oscillation	arrangement
substantially	vibration	essentially	external
prominent	efficient	quickly	exceptional
spontaneously	magnetize	expense	alignment
thermally	development	especially	physicist
resistance	temperature	purely	theoretical
useful	remarkable	amazingly	application
electronics	electronic	commercial	efficiently
situation	different	powerful	magnetic

4. Запомните следующие выражения:

under the influence of – под влиянием

with falling temperature – при снижении температуры

to pass through a coil – проходить через катушку

within a short period of time – за короткий период времени

shortly thereafter – вскоре после этого

to increase by 1 percent – увеличиваться на 1 процент

 

5. Прочитайте и переведите текст, скажите, верны ли следующие утверждения, используя слова ”TRUE”, ”FALSE”.

1. Gold is a poor conductor.

2. For the majority of metals the ability to conduct electricity increases with temperature.

3. The superconductivity hasn’t been implemented until the 1980^th for it was achievable only at extremely low temperatures.

4. Superconducting materials still have limited commercial application so far because of the expenses.