What this topic covers
Graphical representation of e.m.f and current in an a.c. circuit: Graphs of equation I – I₀ sin wt and E = E₀ sinwt should be treated. Peak and r.m.s. values. Phase relationship between voltage and current in the circuit elements; resistor, inductor and capacitor. Series circuit containing resistor, inductor and capacitor: Simple calculations involving a.c. circuit (derivation of formulae not required). Reactance and impedance: X_L and X_C should be treated; simple numerical problems may be set. Vector diagrams. Resonance in an a.c. circuit: Applications in tuning of radio and T.V. should be discussed. Power in an a.c. circuit.
Study this topic in Learn
Practice opens in your WAEC WASSCE workspace after you sign in. Questions and lecture notes stay there.