Which explanation best links the observation to the physics? Context: National Grid substation AC-output. Learning objective: (Physics only) (HT only) Link the motion of the coil or cone to pressure variations in the surrounding air.. Which answer is most accurate for Loudspeakers (physics only) (HT only)? Distinct revision anchor: fluxcue516a coilcue516b fieldcue516c polecue516d gridcue516e motorcue516f generatorcue516g transformercue516h compasscue516i currentcue516j voltagecue516k forcecue516l.

Loudspeakers (physics only) (HT only): National Grid substation AC-output shows (Physics only) (HT only) Link the motion of the coil or cone to pressure variations in the surrounding air. because magnetic effects depend on field direction, current or changing magnetic flux.

Loudspeakers (physics only) (HT only): National Grid substation AC-output shows (Physics only) (HT only) Link the motion of the coil or cone to pressure variations in the surrounding air. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Loudspeakers (physics only) (HT only), uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The National Grid substation AC-output detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue516a coilcue516b fieldcue516c polecue516d gridcue516e motorcue516f generatorcue516g transformercue516h compasscue516i currentcue516j voltagecue516k forcecue516l: 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.