Which option gives the strongest diagnostic reason? Context: phone speaker coil application. Learning objective: Describe how magnetic field strength depends on distance from the magnet.. Which answer is most accurate for Magnetic fields? Distinct revision anchor: fluxcue201a coilcue201b fieldcue201c polecue201d gridcue201e motorcue201f generatorcue201g transformercue201h compasscue201i currentcue201j voltagecue201k forcecue201l.

Magnetic fields: phone speaker coil application shows Describe how magnetic field strength depends on distance from the magnet. because magnetic effects depend on field direction, current or changing magnetic flux.

Magnetic fields: phone speaker coil application shows Describe how magnetic field strength depends on distance from the magnet. because magnetic effects depend on field direction, current or changing magnetic flux. It is correct because it anchors the response to Magnetic fields, uses the relevant magnetic field, coil, current or induction evidence, and avoids mixing motor, generator and transformer ideas. The phone speaker coil application detail makes the option distinct from nearby objectives while still testing the same AQA GCSE Physics learning objective. V10 boundary check fluxcue201a coilcue201b fieldcue201c polecue201d gridcue201e motorcue201f generatorcue201g transformercue201h compasscue201i currentcue201j voltagecue201k forcecue201l: 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.