Which explanation best links the observation to the physics? Context: National Grid substation measurement. Learning objective: (Physics only) (HT only) Calculate the current drawn from the input supply to provide a particular power output.. Which answer is most accurate for Transformers (HT only)? Distinct revision anchor: fluxcue804a coilcue804b fieldcue804c polecue804d gridcue804e motorcue804f generatorcue804g transformercue804h compasscue804i currentcue804j voltagecue804k forcecue804l.

Transformers (HT only): National Grid substation measurement shows (Physics only) (HT only) Calculate the current drawn from the input supply to provide a particular power output. because magnetic effects depend on field direction, current or changing magnetic flux.

Transformers (HT only): National Grid substation measurement shows (Physics only) (HT only) Calculate the current drawn from the input supply to provide a particular power output. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Transformers (HT only), uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The National Grid substation measurement detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue804a coilcue804b fieldcue804c polecue804d gridcue804e motorcue804f generatorcue804g transformercue804h compasscue804i currentcue804j voltagecue804k forcecue804l: in the motor effect, the force is perpendicular to the current and magnetic field; in a generator, relative motion or a changing magnetic field induces a potential difference or induced current; outside a magnet, magnetic field lines go from north to south; AC alternating current changes direction, while DC direct current flows in one direction and needs a commutator in a DC generator context.