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?

Which of the following best explains why reversing the direction of current in a motor coil reverses the rotation direction?

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?

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

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

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?

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 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 a typical DC motor the commutator reverses the current in the rotating coil every half-turn. Why is this necessary when combined with Fleming’s left-hand rule?

A conductor of length 0.80 m sits in a field of 0.75 T. To produce a force of 3.0 N on the conductor, what current is required?

Which statement correctly contrasts Fleming’s left-hand rule and Fleming’s right-hand rule?