Question

Hans Christian Oersted was the first person who noticed the deflection of compass needle every time the current passed through a circuit.​

Answer 1

Explanation:

During a lecture demonstration, on April 21, 1820, while setting up his apparatus, Oersted noticed that when he turned on an electric current by connecting the wire to both ends of the battery, a compass needle held nearby deflected away from magnetic north, where it normally pointed