🔍 Key Concepts

• Identify which part of the circuit contains diodes arranged to conduct in only one direction. • Recall that the section converting AC (alternating polarity) to pulsating DC (single polarity) is called a rectifier. • Compare how the waveform at the transformer secondary would look before and after the rectifying section using the example waveforms (I, E/F, H).

💭 Think About

• Look at sections A, B, C, and D and ask: Where is the first place the waveform stops swinging above and below zero and instead stays on one side of the axis? • Which labeled section is made of components whose main function is to let current pass one way but block it the other way? • After the AC is changed to pulsating DC, later sections typically smooth (filter) or regulate it. Which labeled section appears to be doing that smoothing instead of the initial conversion?

✅ Before You Answer

• Confirm which section contains the transformer only (this changes voltage level, but not AC to DC). • Confirm which section contains inductors and capacitors used for filtering/smoothing, not initial rectification. • Confirm which section contains two diodes connected to the transformer secondary in a way that would produce a unidirectional (pulsating DC) output.