Samacheer Kalvi EM 12 Physics Vol2 Unit9 MCQs Mock Test

12th Physics - Volume 2 Mock Test

Unit 9: Semiconductor Electronics

Choose the correct answer from the multiple choices, then click "Next" to goto next question and click "OK" after seeing the score.

 

1. The barrier potential of a silicon diode is approximately,
   1.   0.7 V
   2.   0.3 V
   3.   2.0 V
   4.   2.2 V
2. Doping a semiconductor results in
   1.   The decrease in mobile charge carriers
   2.   The change in chemical properties
   3.   The change in the crystal structure
   4.   The breaking of the covalent bond
3. A forward biased diode is treated as
   1.   An open switch with infinite resistance
   2.   A closed switch with a voltage drop of 0V
   3.   A closed switch in series with a battery voltage of 0.7V
   4.   A closed switch in series with a small resistance and a battery
4. If a half – wave rectified voltage is fed to a load resistor, which part of a cycle the load current will flow?
   1.   0° – 90°
   2.   90° – 180°
   3.   0° – 180°
   4.   0° – 360°
5. The primary use of a zener diode is
   1.   Rectifier
   2.   Amplifier
   3.   Oscillator
   4.   Voltage regulator
6. The principle in which a solar cell operates
   1.   Diffusion
   2.   Recombination
   3.   Photovoltaic action
   4.   Carrier flow
7. The light emitted in an LED is due to
   1.   Recombination of charge carriers
   2.   Reflection of light due to lens action
   3.   Amplification of light falling at the junction
   4.   Large current capacity
8. When a transistor is fully switched on, it is said to be
   1.   Shorted
   2.   Saturated
   3.   Cut – off
   4.   Open
9. The specific characteristic of a common emitter amplifier is
   1.   High input resistance
   2.   Low power gain
   3.   Signal phase reversal
   4.   Low current gain
10. To obtain sustained oscillation in an oscillator,
    1.   Feedback should be positive
    2.   Feedback factor must be unity
    3.   Phase shift must be 0 or 2p
    4.   All the above
11. If the input to the NOT gate is A=1011, its output is
    1.   0100
    2.   1000
    3.   1100
    4.   0011
12. The electrical series circuit in digital form is
    1.   AND
    2.   OR
    3.   NOR
    4.   NAND
13. Which one of the following represents forward bias diode? (NEET)
    1.   
    2.   
    3.   
    4.   
14. The given electrical network is equivalent to (NEET)
    
    
    1.   AND gate
    2.   OR gate
    3.   NOR gate
    4.   NOT gate
15. The output of the following circuit is 1 when the input ABC is (NEET 2016)
    
    
    1.   101
    2.   100
    3.   110
    4.   010

Samacheer Kalvi EM 12th Std Physics Vol2 Unit9 MCQs Mock Test Instructions

Unit 9: Semiconductor Electronics

Here you will find 15 MCQs questions and options. Read the questions carefully and select the appropriate answer for the question by selecting/clicking the box before the option. A pop-up box will open by displaying the result of the option selected. The result of each question will be based on percentages. Each question will have 3 chances to select the right option and for every chance, the percentage of scores will be reduced. Likewise, the remaining questions also take place. The overall percentage scored will be displayed at the completion of the mock test.

Note: Every time the page loads, the question and options will be randomized and takes you to the beginning of the particular exercise.

Button Navigations:

The Below Image shows the button navigations.

• The Home Button On the Top and Bottom Navigates to the Homepage of the Subject (Example: To Physics Vol2 if the mock test is taken from Physics Vol2).
• The Next Unit Button on the Top and Bottom Navigates to the Next Unit (Example: From Unit 9 to Unit 10 and so on).
• The Prev Unit Button on the Top and Bottom Navigates to the Prev Unit (Example: From Unit 9 to Unit 8 and so on).
• The Next Button next to the question numbers Navigates to the Next Question (Example: From 1 to 2 and so on).
• The Show All Questions Button Displays all the questions and options of that exercise on a single page.
• The Option Box Icon (Box with Question mark icon), is the box that is to be selected for the correct option. By selecting/clicking the option box, a pop-up box will open by displaying the result of the option selected.