Fleming’s right-hand rule
We saw in Faraday’s electromagnetic induction rule that the motions of the coil and therefore the magnet are driven by the movement of electrical current and also the force induced by this force. current is additionally generated.
Fleming’s right-hand rule is used to search out the worth of the direction of this induced electrical phenomenon generate to magnetic induction.
In keeping with Fleming’s law of hand, the index, finger and thumb of the proper hand should be stretched in such some way that the three are perpendicular to every other and therefore the finger is towards the field of force, and also the thumb indicates the direction of motion of the conductor. The median will display the induced current.
This can be called Fleming’s right-hand rule.
As shown within the figure, the thumb is pointed towards the direction of the driving force and therefore the index is towards the magnetic flux. that the direction of median finger are going to be within the direction of induced current.
Field due to a straight linear conductor
it’s been known by the utilization of oscillated current that a force field is generated when current flows in an exceedingly wire. Let’s do an experiment to search out out the character of this area.
By not showing an easy linear conductor within the diagram, the electric circuit is shown so it’s known that the direction of the force lines (ie the direction of the magnetic field) also becomes opposite when the direction of the present is reversed. Vertical wires are more responsible a lightweight horizontal cardboard and an iron filament has been sprinkled on the cardboard.
If the cardboard is knocked down slowly when a robust current flows, then the filings get adjusted into some concentric circles. The force lines thus formed are circular whose center is found on the wire. If alittle compass needle is placed over a cardboard, it’ll be known that this needle points within the direction of force lines but never points towards the motive force. This ends up in the conclusion that “in a straightforward linear conductor, the flow of a magnetic pole isn’t produced but a force field is produced. “
The direction of those force lines is given by the subsequent rules –
(1) Maxwell’s corkscrew rule
in line with this rule, “If this carrying the axle of the motive force is to maneuver a clockwise screw with the correct hand and therefore the tip of the screw within the direction of the present flowing within the driver. If you progress, the direction of rotation of the thumb will express the direction of the magnetic flux. “
(2) Right hand rule
In keeping with this rule, “If the present is to carry the conductor with the correct hand in such the way that the thumb is parallel to the driving force and if the thumb expresses the direction of current flowing within the driver. If this happens, the rotation of the fingers will indicate the direction of the magnetic flux. “
Note: This rule is additionally accustomed find direction of torque. during this rule, four fingers express the direction of current and thumb indicates the direction of torsion.
(3) Right hand palm rule
consistent with this rule, “If we spread the complete paw of the proper hand in such the way that the fingers are perpendicular to the thumb and also the current flowing within the thumb conductor of the i. If the direction and therefore the pointed fingers point towards the purpose P, then the direction of the flux on P is outward perpendicular to the palm.