449.
Find the wrong sentence.
Səhv cümləni tapın.
Найдите неправильное предложение.
Many remarkable things were discovered.
This is the basic principle of the dynamo and motor.
Faraday found that with the aid of a bar magnet could get a current of
electricity in the coil.
The first powerful electromagnet is made by Henry 1829.
By 1830 he had built a small dynamo which changed mechanical energy into
electrical energy.
450.
Find the wrong sentence.
Səhv cümləni tapın.
Найдите неправильное предложение.
Atoms contain electrons which are negatively charged.
We define electricity using the atomic theory.
We all understand what electricity are and the common means by which it is
produced.
The electrons are in the outer part of the atom.
They are free to move from one atom to another.
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