State Fleming's left-hand rule. Explain it with the help of labelled diagrams.

According to Fleming's left-hand rule, when left hand's thumb, forefinger (or, index finger) and centre finger (or, middle finger) are held mutually perpendicular to one another and adjust in such a way that the forefinger points in the direction of the magnetic field, and the centre finger points in the direction of the current, then the direction in which thumb points, gives the direction of force acting on the conductor.