Diodes & Rectification — A/L Physics

How do I practise Diodes & Rectification?

1 question with a worked solution

1. A full-wave bridge rectifier using four ideal p-n junction diodes is fed by a 50 Hz sinusoidal alternating current mains supply. What is the fundamental ripple frequency of the rectified direct-current output voltage?
   1. A) 200 Hz
   2. B) 25 Hz
   3. C) 50 Hz
   4. D) 100 Hz
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   Correct answer: D) 100 Hz

   In a full-wave rectifier, both the positive and negative half-cycles of the AC input are converted into unidirectional output pulses. Since two output pulses occur per single AC input cycle, the output ripple frequency is double the input frequency: f_ripple = 2 × f_in = 2 × 50 Hz = 100 Hz.

   Show worked solution

   Step 1: In full-wave rectification: f_out = 2 · f_in. Step 2: f_out = 2 × 50 Hz = 100 Hz. Answer: 100 Hz.
   Modelled on: the A/L Physics examination pattern

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Where does Diodes & Rectification fit in the syllabus?

Unit 9.2 · Year 2 · Term 2