# Fleming’s Rules

Fleming’s rules can be define as

When a current-carrying conductor is place under a magnetic field, a force acts on the conductor. The direction of this force can be identify with Fleming’s Left Hand Rule.

Likewise,According to Fleming’s rules if a moving conductor is brought under a magnetic field. The electric current will be induce in that conductor.

Moreover, The direction of the induce current can be found using Fleming’s Right Hand Rule. It is important to note that these rules do not determine the magnitude. Instead show only the direction of the three parameters (magnetic field, current, force).

when the direction of the other two parameters is known.

In short there are two Fleming’s rules.

Fleming’s Left-Hand Rule is mainly applicable to electric motors and Fleming’s Right-Hand Rule is mainly applicable to electric generators.

## Fleming’s Right-Hand Rule

According to Faraday’s law of electromagnetic induction, when a moving conductor is place inside a magnetic field, a current will be induced in it. If the conductor is forcefully move inside the magnetic field, there will be a relationship between the direction of applied force, magnetic field and the current. Moreover, This relation between these three directions is determine by Fleming’s right-hand rule.

As shown in the figure above, the right-hand rule requires you to

Hold the right hand fore finger, middle finger and the thumb at right angles to each other. If the forefinger represents the direction of the magnetic field, the thumb points in the direction of motion or applied force, then the middle finger points in the direction of the induced current.”

### Fleming’s Left-Hand Rule

When a current-carrying conductor is place in an external magnetic field,  the conductor experiences a force perpendicular to both the field and to the direction of the current flow. A left hand can be held, as shown in the illustration, so as to represent three mutually orthogonal axes on the thumb, forefinger and middle finger.

The left-hand rule requires you to,

• “Hold out your left hand with the forefinger, second finger and thumb perpendicular to each other. If the forefinger represents the direction of the field and the second finger represents that of the current, then thumb gives the direction of the force.”