Force on a Current Carrying Conductor Lying in a Magnetic Field

Force on a Current Carrying Conductor Lying in a Magnetic Field Points : Force on a Current Carrying Conductor Lying in a Magnetic Field It has been found that whenever a current carrying conductor is placed in a magnetic field, it experiences a force which acts in a direction perpendicular both to the direction of the current and the field.
On the upper side of the conductor, the magnetizing forces of the field and of the current in the conductor are additive, while on the lower side these are subtractive. This explains why the resultant field is strengthened above and weakened below the conductor. Thus the conductor has a force on it which tends to move it downwards.

“Hold your left hand with index finger, middle finger and thumb at right angles. If the index finger points in the direction of the flux from north to south and middle finger points in the direction of the imposed voltage and its resulting conventional current flow, then the thumb will point in the direction of the force that is developed.