| |
KF5JRV > TECH 10.10.16 16:16l 12 Lines 611 Bytes #999 (0) @ WW
BID : 3371_KF5JRV
Read: GUEST
Subj: ElectroMagnet
Path: IW8PGT<F1OYP<F4DUR<CX2SA<N0KFQ<KF5JRV
Sent: 161010/0836Z 3371@KF5JRV.#NWAR.AR.USA.NA BPQK6.0.13
William Gilbert published De Magnete, a paper on magnetism in 1600, about
the use and properties of Magnetite. In 1819, Hans Christian Oersted reported
that when an electric current in a wire was applied to a magnetic compass
needle, the magnet was affected - this is called electromagnetism.
In 1825, British inventor William Sturgeon (1783-1850) exhibited a device that
laid the foundations for large-scale electronic communications:
Sturgeon displayed its power by lifting nine pounds with a seven-ounce piece
of iron wrapped with wires through which the current of a single cell battery
was sent.
Read previous mail | Read next mail
| |
