A.C. timing
A supply has frequency 60 Hz. Find its period.
Sinusoidal value
v=200sin(120πt). Find v at t=1/240 s.
RMS
Find rms current for peak current 8.0 A.
Power
A 24 Ω resistor carries 3.0 A rms. Find mean power.
Transformer
A 1500-turn primary at 240 V gives 12 V. Find secondary turns.
Rectification
Compare half-wave and full-wave rectification.
Smoothing
Explain why a larger capacitor reduces ripple.