(a) Fleming’s left-hand rule

(b) Clock rule

(c) Right hand thumb rule

(d) Fleming’s right-hand rule

Solution:

The correct option is (d) Fleming’s left-hand rule.

If we stretch out the forefinger, middlefinger, and thumb of the left hand so that they are all perpendicular to each other, we have Fleming’s left hand rule. Now, if the forefinger points in the direction of the magnetic field, the middle finger points in the direction of current, and the thumb points in the direction of force acting on the conductor, the thumb shows the direction of force operating on the conductor.