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applications of electromagnets

Physics

MAGNETIC EFFECT OF AN ELECTRIC CURRENT

Introduction: Oersted’s discovery. Hans Christian Oersted discovered the magnetic effect of a current in 1819. The direction of the field is dependent on the direction of the current. This discovery brought about the development of electric bells, electric motors, telephone receivers and radios.   Determining the direction of the lines of force. The direction of the lines of force can be determined using a simple rule called the right-hand screw rule. This rule states that “if a right-hand screw advances in the direction of the current , then the rotation of the screw is in the direction of the field”.   Another rule is the right-hand grip rule which states that “if the wire carrying a current is gripped with the right hand, using the thumb along the conductor and pointing in the direction of the current, then the direction of curled fingers is in the direction of the lines… Read More »MAGNETIC EFFECT OF AN ELECTRIC CURRENT

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