ICTSM NSQF - Module 5 : Diode, Rectifier, Filter, Zener diode, Transistor and Amplifiers

 1. What is the current through the Zener diode with full load condition?

• Zero 
• Minimum 
• Maximum 
• Remains constant

 2. Which component filter the ripples in the rectifier circuit?

• DIAC 
• Diode 
• TRIAC 
• Capacitor

 3. Which parameter is maintained constant in Zener diode?

• Power
• Current 
• Voltage 
• Resistance

 4. When does the Zener diode begins to conduct in the reverse biased condition?

• When bias voltage reached 0.7 V 
• After the barrier voltage cancelled 
• Voltage across Zener reached 0.3 V
• Voltage across it reached the Zener voltage 

 5. What is the current through the zener diode under no load condition?

• Zero 
• Minimum 
• Maximum 
• Remains constant

 6. Which is used for to operate in the reverse breakdown region?

• Diode 
• Capacitor 
• Zener diode 
• Resistor 

 7. What is the meaning of first letter indicated in the transistor code number BC 107?

• Germanium material used 
• Silicon material used
• Antimony material used 
• Indium material used

 8. Which electrical quantity controls the operation of the bipolar transistor device?

• Energy 
• Current 
• Voltage 
• Frequency

 9. Why transistors made of silicon is preferred over the germanium semiconductor material?

• Complex design 
• Higher thermal stability 
• Requires complicated bias arrangement 
• Silicon transistor needs low cut-in-voltage.

10. Why NPN type of transistors are preferred over the PNP type transistors?

•  NPN has lower switching speed 
•  NPN has good bias stability 
•  NPN has higher switching speed 
•  Low operating voltage

 11. Which type of transistors are required to amplify signals from the microphone / transducer?

• Low power transistors
• Medium power transistors 
•  High power transistors 
•  Epitaxial versa watt transistors

 12. What type of packaging is generally used to transistors utilized for low power amplification?

• Metal packaging 
• Plastic packaging 
• Ceramic packaging 
• Plastic packaging with metal heat sinks

13. What is the voltage gain in a transistor if the input voltage in 40 mv and the output voltage in 3.6 V?

• 45 
• 90 
• 180 
• 270 

 14. How the negative feedback is called?

• Regenerative feedback 
• Degenerative feedback 
• Current controlled feedback
• Voltage controlled feedback

 15. What is the advantage of using bias in transistor circuits?

• Provides positive feedback 
• Never reach saturation 
• Easily sets saturated 
• Gives maximum distortion