How to know whether to use Fleming's left hand or right hand rule?Watch
right hand rule is concerned with field lines around a current carrying wire given the direction of flow
in other words if they ask u to draw magnetic field lines around a current carrying wire, it will most probably be right hand rule
if they want u to state which way something moves, it will most probably be left hand rule
thanks for replying so quickly! in the question above it asks to explain whether the current will provide a force that increases the speed of the conductor. in the mark scheme theyve used both rules to show force is to the left. what would be the reason they used RHR if LHR tells you what you need to know?
I only do GCSEs but left hand rule is to do with the motor effect whereas right hand rule is to do with the generator effect. With LHR, you're normally trying to find the direction of motion.