alleryWho discovered in 1820 that a compass needle is deflected by an electric current?
AMichael Faraday
BAlessandro Volta
CIsaac Newton
DHans Ørsted
Answer & Solution
Correct answer: D. Hans Ørsted
1. In 1820 a compass needle was seen to move near a wire carrying current.
2. This showed electricity produces magnetism.
3. The discoverer was Hans Christian Ørsted.
_Source: Wikipedia, Magnet, Discovery and development_
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