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Oersted's 1820 experiment showed that an electric current
AProduces a magnetic field around the wire
BProduces a sound wave around the wire
CProduces a chemical reaction in the wire
DProduces a gravity wave around the wire
Answer & Solution
Correct answer: A. Produces a magnetic field around the wire
1. Section 10.1 describes Oersted's experiment.
2. A current-carrying wire moves a nearby compass needle.
3. This proves a magnetic field exists around the wire.
4. So option A is correct.
_Source: Selina Concise Physics Class 10, Ch 10 Electromagnetism (Mistral OCR'd PDF), section 10.1_
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