1. What is the main purpose of using Opto Coupler?
A- Isolating Gating circuit from the power lines.
2. Photo Diodes are used under which Bias?
A- Reverse
3. While LCD and LED are compared the advantage of LCD is in terms of ?
A- Low power requirement
4. Which pattern is in the Surface Emitter LED ?
A- Lambertian Patten
5. LED require voltage and current ?
A- 1.2 Volts and 20 mA respectively.
6. On what factor the wavelength of the emitted light in an LED depends ?
A- The Energy gap of the materials
7. The materials generally used for LED are ?
A- Compounds of Gallium
8. In which region the GaAs LED emit radiation ?
A- Infrared Region
9.What is the main advantage of the SMPS over Linear Power Supply ?
A- Low Power Dissipation
10 . What is the other name given to the Switching Regulators ?
A- Non - Dissipative Regulators.
11. Shunt Type regulator finds its application in?
A- High Current , Low Voltage
12. What is the major difference in the Shunt And Series Regulator
A- IT is in the positioning of the Control Element.
13. What Percentage of Regulation should a Regulated Power Supply have?
A- Zero %
14. What is the effect of the load change on the output voltage in Load Regulation ?
A- When the load changes the output voltage remains constant
15. How is the Line Regulation determined ?
A- Change in Output and Input Voltage.
