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

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?

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?

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?

Which finger in Fleming’s left-hand rule shows the direction of the magnetic field?

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?

An engineering drawing shows a coil side at the front with current flowing left and the magnetic field directed from top to bottom. Using Fleming’s left-hand rule, is the front side pushed toward or away from you and why?

A rectangular coil in a motor has the left side conductor carrying current into the page and the right side carrying current out of the page. The magnetic field runs from top to bottom. Using Fleming’s left-hand rule, which way does the coil rotate (viewed from front)?

A motor’s coil side A experiences a force up and side B experiences a force down. What net effect does this produce on the coil according to Fleming’s left-hand rule?

A conductor of length L carries current I through a region of magnetic flux density B at 90°. The magnitude of the force is given by F = BIL. Which of these changes increases F by a factor of 4?

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?