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Вопрос № 62847 - Английский язык

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Real telegraphs were possible until it was proved that electricity and magnetism were connected. It was found that a needle of a compass moved when it was put near а wirе with a current flowing through it. A compass needle is a magnet. If a wire carrying a current could move it, then the wire must be a magnet too.
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  • A compass needle is electricity.
  • A wire carrying an electric current can move a compass needle because they are both magnets.
  • A needle of a compass didn’t move when it was put near а wire with a current flowing through it.
  • It was discovered that electricity and magnetism aren’t connected.
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Вопрос задал(а): Анастасия, 14 Декабрь 2015 в 14:58
На вопрос ответил(а): Любимов Павел, 14 Декабрь 2015 в 14:59

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Real telegraphs were possible until it was proved that electricity and magnetism were connected. It was found that a needle of a compass moved when it was put near а wirе with a current flowing through it. A compass needle is a magnet. If a wire carrying a current could move it, then the wire must be a magnet too.
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Real telegraphs were possible earlier than it was proved that telegraph and magnetism were connected.
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