🔍 Key Concepts
• Identify what section A (transformer T1) and section B (diodes D1, D2) do to an AC input
• Look at section C (L1 and C1) and think about what an inductor-capacitor combination usually does to a rectified waveform
• Examine section D (Q1, R1, CR1, RL) and ask what role a transistor plus a diode reference commonly plays in a power circuit
💭 Think About
• From the waveforms E through I, match the order in which an AC input would be transformed, rectified, filtered, and possibly controlled
• Compare each answer choice with the actual parts shown: do you see the typical components of a bridge circuit, a measuring instrument, or a magnetic device?
• Ask yourself: does this circuit appear to be shaping, measuring, or stabilizing the voltage supplied to a load?
✅ Before You Answer
• Verify whether the two diodes D1 and D2 form a full‑wave rectifier working from the transformer secondary
• Confirm that L1 and C1 together act as a filter, changing pulsating DC into smoother DC
• Check if Q1 with CR1 and R1 is arranged as a control/regulating element in series with the load RL, rather than as part of a measurement bridge or magnetic core device