Which explanation best links the observation to the physics? Context: National Grid substation application. Learning objective: (Physics only) (HT only) Recall and apply the equation Vp x Ip = Vs x Is for a 100 percent efficient transformer.. Which answer is most accurate for Transformers (HT only)? Distinct revision anchor: fluxcue780a coilcue780b fieldcue780c polecue780d gridcue780e motorcue780f generatorcue780g transformercue780h compasscue780i currentcue780j voltagecue780k forcecue780l.

Transformers (HT only): National Grid substation application shows (Physics only) (HT only) Recall and apply the equation Vp x Ip = Vs x Is for a 100 percent efficient transformer. because magnetic effects depend on field direction, current or changing magnetic flux.

Transformers (HT only): National Grid substation application shows (Physics only) (HT only) Recall and apply the equation Vp x Ip = Vs x Is for a 100 percent efficient transformer. 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 application detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue780a coilcue780b fieldcue780c polecue780d gridcue780e motorcue780f generatorcue780g transformercue780h compasscue780i currentcue780j voltagecue780k forcecue780l: 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.