alleryWho discovered in 1820 that a current deflects a compass needle?
AHans Oersted
BGeorg Ohm
CAndre Ampere
DJames Joule
Answer & Solution
Correct answer: A. Hans Oersted
1. The link between electricity and magnetism was found by accident.
2. In 1820 Hans Christian Oersted found that a compass needle was deflected when current passed through a nearby wire.
3. This showed that electricity and magnetism are related phenomena.
_Source: syllabus Science, Ch 13 'Magnetic Effects of Electric Current'_
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