Flemings Left-hand Rule (ht Only) (GCSE Physics)

In applying Fleming’s left-hand rule you align first finger with B and second finger with I. If you must use your left hand but accidentally use your right hand with the same finger alignment, what is true about the predicted thumb direction?

In Fleming’s left-hand rule which finger shows the direction of the conventional current?

A straight conductor 0.50 m long lies perpendicular to a uniform magnetic field of 0.40 T. A steady current of 8.0 A flows in the conductor. What is the magnitude of the magnetic force on the conductor?

In a small DC motor the commutator reverses contact so the coil current flips each half-turn. Using Fleming’s left-hand rule, why does the commutator reversing current at that moment keep rotation continuous rather than reversing it?

In a loudspeaker, the voice coil sits in a radial magnetic field. An alternating current produces an alternating force (motor effect) on the coil. Which of these correctly links the direction reversals?

A straight conductor lies across a uniform magnetic field directed from left to right. Conventional current flows upward along the conductor. Using Fleming’s left-hand rule, what is the direction of the magnetic force on the conductor?

In a single-turn rectangular coil in a uniform downward magnetic field, the front face of the coil carries current left-to-right while the back face carries current right-to-left. Using Fleming’s left-hand rule, the front face experiences a force in which direction relative to the coil?

An electron beam (negative charges) moves to the right through a magnetic field pointing into the page. Using Fleming’s left-hand rule for conventional current, which way is the magnetic force on the electrons?

A motor designer uses Fleming’s left-hand rule to check directions. If the magnetic field points from the magnet’s north to south (rightwards) and the force on the conductor must be upwards, which way must the conventional current in that conductor flow?

A 0.25 m length of wire in a 0.60 T magnetic field carries 12 A of current perpendicular to the field. What is the magnetic force on that wire and which way would it act using Fleming’s left-hand rule if the current is from left to right and the field points from top to bottom?

Fleming’s left-hand rule is applied using the direction of conventional current. Which statement about electron flow is correct?