Question

State the rule which gives the direction of force acting on a current carrying conductor kept in a magnetic field.

Answer 1

Flemmings left hand rule
according to this rule when we extend our thumb, forefinger and middle finger in such a way that they are perpendicular to each other, and the forefinger points in the direction of magnetic field, middle finger points in the direction of current, then thumb points in the direction of force.
hope it helps

Answer 2

if the force acting on the current carrying conductor is mentioned then it is only LEFT HAND RULE
LEFT HAND RULE=if the first finger of your left hand is the direction of the magnetic field and the second finger is the direction of the current then the thumb is the direction of the force ...
here if the direction of magnetic field and current are perpendicular then the force is maximum ... if they are parallel then it is minimum ...
hope the answer is helpful!!