Semiconductor Electronics: Materials, Devices and Simple Circuits Class 12 MCQs Questions with Answers

1. The Voltage gain is highest for

2. The energy band gap is maximum in which of the following?

3. In an n-p-n transistor circuit the collector current is 18 mA. If 90% of the electrons emitted reach the collector, than the emitter current is:1.6 mA

4.  
At which temperature, a pure semiconductor behaves slightly as a conductor?

5. Winch of the following gate is not an universal gate?

6.  
Region without free electrons and holes in a p-n junction is

7.  
Diffusion current in a p-n junction is greater than the drift
current in magnitude

8. p-n junction diode can be used as:

9. An oscillator is an amplifier with:

10. On applying reverse bias to a junction diode, it:

11. In principle, Boolean algerbra is based on:

12.  
 In good conducrors of electricity the type of bonding that exist is

13. The relation between number of free electrons (n) in a semiconductor and temperature (T) is given by:

14. If the conductivity of a semiconductor is only due to break of the covalent band due to the thermal excitation, then the semiconductor is called:

15.  
What is a rectifier used for?

16. Semiconductors of both p-type and n-type are produced by:

17. A p-type semiconductor is:

18.  
Let nh and ne be the number of holes and conduction electrons in an extrinsic semiconductor. Then

19. The mobility of conduction electrons is greater than that of holes since electrons is greater than that of holes since electrons.

20. Energy bands in solids are a consequence of: