Предмет: Физика, автор: RamirGu5205

Зависит ли значение проводника от значений тока и напряжения?

Ответы

Автор ответа: flin1

Зависимость силы тока в электрической цепи описывается с помощью закона Ома. Сила тока I прямо пропорциональна величине U напряжения, и обратно пропорциональна сопротивлению R.

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There are no important official or legal distinctions between the various types of university in the country. But it is possible to discern a few broad categories

Oxbridge. This name denotes the universities of Oxford and Cambridge, both founded in the medieval period. They are federations of semi-independent colleges, each college having its own staff, known as 'Fellows'. Most colleges have their own dining hall, library and chapel and contain enough accommodation for at least half of their students. The Fellows teach the college students, either one-to-one or in very small groups (known as 'tutorials' in Oxford and 'supervisions' in Cambridge). Oxbridge has the lowest student staff ratio in Britain. Lectures and laboratory work are organized at university level. As well as the college libraries, there are the two university libraries, both of which are legally entitled to a free copy of every book published in Britain. Before 1970 all Oxbridge colleges were single-sex (mostly for men). Now, the majority admit both sexes.

The old Scottish universities. By 1600 Scotland boasted four universities. They were Glasgow, Edinburgh, Aberdeen and St Andrews. The last of these resembles Oxbridge in many ways, while the other three are more like civic universities in that most of the students live at home or find their own rooms in town. At all of them the pattern of study is closer to the continental tradition than to the English one - there is less specialization than at Oxbridge.

The early nineteenth-century English universities. Durham University was founded in 1832. Its collegiate living arrangements are similar to Oxbridge, but academic matters are organized at university level. The University of London started in 1836 with just two colleges. Many more have joined since, scattered widely around the city, so that each college (most are non-residential) is almost a separate university. The central organization is responsible for little more than exams and the awarding of degrees.

The older civic ('redbrick') universities. During the nineteenth century various institutes of higher education, usually with a technical bias, sprang up in the new industrial towns and cities such as Birmingham, Manchester and Leeds. Their buildings were of local material, often brick, in contrast to the stone of older universities (hence the name, 'redbrick'). They catered only for local people. At first, they prepared students for London University degrees, but later they were given the right to award their own degrees, and so became universities themselves. In the mid twentieth century they started to accept students from all over the country.

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