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Q.

In which year did Hans Christian Oersted discover that compass needle get deflected when an electric current is passed through a metallic wire?

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a

1820

b

1920

c

1777

d

1851

answer is A.

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Detailed Solution

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In 1820, Hans Christian Oersted accidentally discovered the phenomenon.

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In which year did Hans Christian Oersted discover that compass needle get deflected when an electric current is passed through a metallic wire?