Unit 1 – Diodes, LED, Clipper & Clamper

English – Part B (2-mark) Short Answer Questions and Answers

1. Differentiate between positive and negative clipper.
   Positive clipper removes positive half of the input; negative clipper removes the negative half.
2. What is Peak Inverse Voltage (PIV)?
   Maximum reverse voltage a diode can withstand without breakdown.
3. Define Ripple Factor.
   Ratio of RMS AC component to DC component in rectifier output: γ = Vac(rms)/Vdc.
4. Differentiate between clipper and clamper.
   Clipper cuts a portion of signal; clamper shifts entire signal level.
5. State two applications of LED.
   Used in displays and optical communication.
6. Define LED.
   Light Emitting Diode – forward-biased PN junction that emits light.
7. What is a biased clipper?
   Uses a DC source to clip signal above/below a chosen level.
8. Define photo-diode.
   Reverse-biased PN junction that conducts when light falls on it.
9. State two applications of photo-diode.
   Used in light sensors and optical receivers.
10. What is a clipper circuit?
    Circuit that removes signal portion above/below a reference voltage.

Tamil– Part B (2-mark) Short Answer Questions and Answers

1. Differentiate between positive and negative clipper.
   Positive clipper இல் positive half wave remove ஆகும்; Negative clipper இல் negative half wave remove ஆகும்.
2. What is Peak Inverse Voltage (PIV)?
   PIV என்பது diode reverse bias இல் breakdown ஆகாமல் தாங்கும் maximum voltage.
3. Define Ripple Factor.
   Rectifier output இல் AC component உம் DC component உம் ratio அது γ = Vac(rms)/Vdc.
4. Differentiate between clipper and clamper.
   Clipper signal ஐ cut செய்கிறது; Clamper முழு signal ஐ up அல்லது down shift செய்கிறது.
5. State two applications of LED.
   Display systems (7-segment) மற்றும் Optical communication இல் use செய்யப்படுகிறது.
6. Define LED.
   LED (Light Emitting Diode) ஒரு forward-biased PN junction ஆகும் இது light emit செய்கிறது.
7. What is a biased clipper?
   DC source use பண்ணி signal ஐ zero இல்லாமல் வேறு level இல் clip செய்வது.
8. Define Photo-diode.
   Photo-diode reverse bias இல் light fall ஆகும் போது current produce செய்யும் device.
9. State two applications of Photo-diode.
   Light sensor மற்றும் Optical receiver இல் use செய்கிறது.
10. What is a clipper circuit?
    Input waveform இல் ஒரு பகுதியை remove செய்யும் circuit.