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Which explanation best links the observation to the physics? Context: National Grid substation voltage-change. Learning objective: (HT only) Recognise that the motor-effect equation is given on the Physics equation sheet.. Which answer is most accurate for Fleming's left-hand rule (HT only)? Distinct revision anchor: fluxcue444a coilcue444b fieldcue444c polecue444d gridcue444e motorcue444f generatorcue444g transformercue444h compasscue444i currentcue444j voltagecue444k forcecue444l.
- A.Fleming's left-hand rule (HT only): National Grid substation voltage-change shows (HT only) Recognise that the motor-effect equation is given on the Physics equation sheet. because magnetic effects depend on field direction, current or changing magnetic flux.
- B.It says field lines travel from south to north outside the magnet. (efficiency error).
- C.It makes AC and DC equivalent. (energy-transfer error).
- D.It ignores relative motion or changing magnetic flux. (field-shape error).
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