INTRODUCTION TO MACHINERY PRINCIPLES:PRODUCTION OF INDUCED FORCE ON A WIRE

PRODUCTION OF INDUCED FORCE ON A WIRE

A magnetic field induces a force on a current-carrying conductor within the field (Fig. 2.12). The force induced on the conductor is given by

F = i (l X B)

The direction of the force is given by the right-hand rule. If the index finger of the right hand points in the direction of vector l, and the middle finger points in the direction of the flux density vector B, the thumb will point in the direction of the resultant force on the wire. The magnitude of the force is

INDUCED VOLTAGE ON A CONDUCTOR MOVING IN A MAGNETIC FIELD

A magnetic field induces a voltage on a conductor moving in the field (Fig. 2.13). The induced voltage in the conductor is given by

where v = velocity of conductor

B = magnetic flux density

l = length of conductor in magnetic field

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