🔍 Key Concepts

• Identify what each labeled section A, B, C, and D of the power supply does (transformer, rectifier, filter, regulator). • Recall that pulsating DC comes from the rectifier and is then passed through a filter network to reduce ripple. • Consider where an inductor (L1) and capacitor (C1) working together would have the strongest effect on smoothing out voltage variations.

💭 Think About

• Which section is responsible for simply changing AC to DC, and which section is specifically designed to smooth that DC? • In a typical power supply, at what stage are inductors and capacitors arranged to block AC ripple and pass DC? • Does the regulation stage mainly stabilize voltage against load/line changes, or is it the main stage for removing the bulk of the ripple?

✅ Before You Answer

• Verify which section contains the rectifier diodes (D1, D2) that create pulsating DC. • Verify which section includes the inductor L1 and capacitor C1 configured as a filter network. • Confirm which section primarily acts as a voltage regulator (using Q1, R1, CR1) rather than as the main ripple smoother.