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18th Chapter

12th Class Physics Chapter 18 Test

Here you can prepare 12th Class Physics Chapter 18 Electronics Test. Click the button for 100% free full practice test.

Second Year Physics Chapter 18 Online MCQ Test for 2nd Year Physics Chapter 18 Electronics Preparation

This online test contains MCQs about following topics:.

- Rectification - Specially Designed p-n Junction - Transistors - Transistor as an Amplifier - Transistor as a Switch - Operational Amplifier - OP-AMP as Inverting Amplifier - OP-AMP as Non-Inverting Amplifier - OP-AMP as a Comparator - Comparator as a Night Switch - Digital Systems - Fundamental Logic Gates - Other Logic Gates - Applications of Gates in Control Systems

FSC Part 2 Physics Ch 18 Test
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Second Year Physics Chapter 18 Online MCQ Test for 2nd Year Physics Chapter 18 Electronics Preparation

Sr. # Questions Answers Choice
1 In an N-type silicon, which of the following statement is true?
  • A. Electrons are majority carriers & trivalent atoms are the dopants
  • B. Electrons are majority carriers & pentavalent atoms are the dopants
  • C. Holes are minority carriers & pentavalent atoms are the dopants.
  • D. Holes are minority carriers & trivavalent atoms are the dopants.
2 The potential barrier for silicon is.
  • A. 0.7 V
  • B. 0.5 V
  • C. 0.3 V
  • D. 0.9 V
3 Minimum number of semi conductor diodes required for full wave rectification are.
  • A. 1
  • B. 2
  • C. 3
  • D. 4
4 Base of transistor is of order:
  • A. 10<sup>-11</sup>m
  • B. 10<sup>6</sup>m
  • C. 10<sup>-8</sup>m
  • D. 10<sup>-6</sup>m
5 Greater concentration of impurity is added in.
  • A. Base
  • B. Emitter
  • C. Collector
  • D. LED
6 In a transistor, collector current is controlled by:
  • A. Collector voltage
  • B. Base current
  • C. Collector resistance
  • D. All of the above
7 The semi conductor diode has the property of
  • A. Two way conduction
  • B. Zero conduction
  • C. One way conduction
  • D. Amplification
8 Which one has greater cone of impurity among all:
  • A. Emitter
  • B. Base
  • C. Collector
  • D. All are pure
9 When transistor are used in digital circuits they usually operate in the :
  • A. Active region
  • B. Break down region
  • C. Saturation &amp; cutoff regions
  • D. Linear region
10 The reverse saturation current in a PN junction diode is only due to:
  • A. Majority carriers
  • B. Minoritycarriers
  • C. Acceptor ions
  • D. Donor ions

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