(i) Right hand thumb rule is used to determine the direction of magnetic field produced around a straight current-carrying conductor.

The thumb rule states that, if the current carrying conductor is held in the right hand such that the thumb points in the direction of the current, then the direction of the curl of the fingers will given the direction of the magnetic field.

(ii) Fleming’s left hand rule gives us the force experienced by a straight current carrying conductor placed in a magnetic field perpendicular to it.

The rule states that, stretch the forefinger, the central finger and the thumb of the left hand mutually perpendicular to each other. If the forefinger points in the direction of the magnetic field, the central finger in the direction of current, then the thumb points in the direction of force in the conductor.

(iii) Fleming’s right hand rule gives the direction of induced current in a coil due to it's rotation in a magnetic field. 

Rule states that if you stretch the thumb, forefinger and the central finger of the right hand mutually perpendicular to each other. If the forefinger points in the directions of magnetic field, thumb in the direction of motion of the conductor, then the central finger points in the direction of current induced in the conductor.