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

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

2. In principle, Boolean algerbra is based on:

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

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

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

8. The Voltage gain is highest for

9. A p-type semiconductor is:

10. 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:

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

12.  
Diffusion current in a p-n junction is greater than the drift
current in magnitude

13.  
Let nh and ne be the number of holes and conduction electrons in an extrinsic semiconductor. Then

14. 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

15. An oscillator is an amplifier with:

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

17. Energy bands in solids are a consequence of:

18.  
What is a rectifier used for?

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

20.  
 In good conducrors of electricity the type of bonding that exist is