Hans Christian Oersted (1777-1851) observed that a compass needle suffers a deflection when placed n

Question

Hans Christian Oersted (1777-1851) observed that a compass needle suffers a deflection when placed near a metal wire carrying an electric current. This discovery gave the first evidence of a connection between electric and magnetic phenomena. Andre Ampere (1775-1836) grasped the significance of Oersted's discovery. He carried out a large series of experiments to explore the relationship between current electricity and magnetism. On the basis of experiments, he hypothesised that all magnetic phenomena are due to circulated electric currents. Later on many devices such as electromagnets, electric motors, microphones, electric generators, etc. were developed on the basis of magnetic phenomena.\ A magnetic needle is a/an :

Professor PC Thomas Classes · Answer

(d) : A magnetic needle is a small bar magnet pivoted at its center of mass.\