How can it be shown that a magnetic field exi | vedclass

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(B) To demonstrate the existence of a magnetic field around a current-carrying wire,we place a magnetic compass needle near the wire. Since a magnetic

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By using a compass needle

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(B) To demonstrate the existence of a magnetic field around a current-carrying wire,we place a magnetic compass needle near the wire. Since a magnetic compass needle is itself a small magnet,it experiences a force when placed in a magnetic field. When the current flows through the wire,the needle shows a deflection,which confirms the presence of a magnetic field around the conductor.

How can it be shown that a magnetic field exists around a wire through which a direct current is passing?

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