1. G.Ohm experimented with current flow in m... conductors.
2. How much current will an'e...heater carry when a p... difference of 120 V is applied to it? 3. Ohm’s discovery of his law aroused such b...antagonism that he.lost his position. 4. Ohm stated his law having no r... voltmeters, ammeters or batteries. 5. This is the w...k...& f... law in electricity.
31. /4 мин./ Парная работа, а) Прослушав предложения, прочитанные партнером, передайте их содержание по-русски, б) Поменяйтесь ролями.
1. Ohm found that the amount of current that flows through a wire varies directly as the amount of the potential difference & inversely as the “resistance” of the wire. 2. He changed the “resistance” of the wire by changing only its length. 3. The resistance of a current path may be determined if the potential difference & the current are known.
32. /6 мин./ Парная работа, а) Прослушайте вопрос партнера и дайте на него ответ. Поменяйтесь ролями, б) Используйте эти вопросы в беседе о законе Ома.
1. What did Ohm discover in 1824? 2. How may the potential difference be determined according'to Ohm’s law? 3. Was Ohm’s law recognized at once?
34. /4 мин./ Составьте 4 предложения из следующего набора
слов.
1. То experiment, current, flow, metallic, conductor. 2. Ohm, law, to express, mathematically, follow. 3. Wire, to have, potential, difference, end. 4. Amount, current, to vary, directly, potential, difference, inversely, resistance, wire.
35. /5 мин./ Закончите предложения.
1. G.Ohm experimented with current flow in... 2. He found that the amount of current... 3. The amount of current varies inversely as the resistance of... 4. Ohm changed the resistance of the wire by... 5. Equation may be solved for R or for E & thus the resistance...
36. /7 мин./ Напишите 5-6 предложений о суди закона Ома и о его практическом значении.
37. Определите'значение слова “current” в следующих словосочетаниях и предложениях. /6 мин./
Direct current - direct current generator, d.c.motor, dc meter; /D.C., d.c., d-c, dc/
Alternating current - alternating current generator, A.C. resistance, a-c /А.С., a.c., ас/ meter, polyphase ac.
Kind of current, current strength, current intensity, decrease of current, increase of current, direction of current, direction of current flow, path of current /current path/, eddy current; to carry current, to consume current,to pass a current through, the current passes through, to deliver current. The current lags the voltage by 30 degrees. The current leads the voltage by 30 degrees.
