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Coil the wire around the nail. Connect one end of the wire to the positive battery terminal. Connect the other end of the wire to the negative battery terminal. What has been made by making this series circuit? A. a stronger battery B. an electromagnet C. a galvanometer D. an electric nail

Sagot :

AL2006idn

A).  No.  In fact, the longer you leave things hooked up like this, the weaker the battery becomes.

B).  Yes !  As long as everything stays hooked up like this, the nail is a magnet. (Until the battery finally dies of exhaustion.)

C).  No.

D).  I don't think so.  Never heard of this one.

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