alleryWhich scientist observed in 1820 that a magnetic needle near a current-carrying wire turns through an angle, revealing the link between electricity and magnetism?
AJames Clerk Maxwell
BHans Christian Oersted
CJohn Ambrose Fleming
DMichael Faraday (1791)
Answer & Solution
Correct answer: B. Hans Christian Oersted
1. The discovery that current deflects a nearby magnetic needle was made in 1820.
2. The chapter credits Hans Christian Oersted with this observation and the unit of magnetic field intensity is named after him.
3. The option Faraday is associated with electromagnetic induction (1831), a different discovery.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 4 "Effects of Electric Current", p.61_
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