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

Electronics MCQs

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

a) Zero
b) Minimum
c) Maximum
d) Remains constant

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

a) DIAC
b) Diode
c) TRIAC
d) Capacitor

3. Which parameter is maintained constant in Zener diode?

a) Power
b) Current
c) Voltage
d) Resistance

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

a) When bias voltage reached 0.7 V
b) After the barrier voltage cancelled
c) Voltage across Zener reached 0.3 V
d) Voltage across it reached the Zener voltage

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

a) Zero
b) Minimum
c) Maximum
d) Remains constant

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

a) Diode
b) Capacitor
c) Zener diode
d) Resistor

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

a) Germanium material used
b) Silicon material used
c) Antimony material used
d) Indium material used

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

a) Energy
b) Current
c) Voltage
d) Frequency

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

a) Complex design
b) Higher thermal stability
c) Requires complicated bias arrangement
d) Silicon transistor needs low cut-in-voltage

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

a) NPN has lower switching speed
b) NPN has good bias stability
c) NPN has higher switching speed
d) Low operating voltage

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

a) Low power transistors
b) Medium power transistors
c) High power transistors
d) Epitaxial versa watt transistors

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

a) Metal packaging
b) Plastic packaging
c) Ceramic packaging
d) Plastic packaging with metal heat sinks

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

a) 45
b) 90
c) 180
d) 270

14. How is negative feedback called?

a) Regenerative feedback
b) Degenerative feedback
c) Current controlled feedback
d) Voltage controlled feedback

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

a) Provides positive feedback
b) Never reach saturation
c) Easily sets saturated
d) Gives maximum distortion