D.4.5 (HL)—Rotating-coil emf Topic Practice
D.4.5 (HL)—Rotating-coil emf Topic Practice
Match rotating-coil positions to sinusoidal emf output by relating coil orientation and rotation axis to sign, phase and period.
How this is tested
- match a coil diagram to the correct sine or cosine emf graph by deciding the initial sign and phase
- draw the emf-time graph for a rotating loop with the correct period, zeros and positive or negative start
- use flux and emf graphs to identify the quarter-cycle phase difference in a rotating-coil generator