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

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

2. 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

3. A p-type semiconductor is:

4.  
 In good conducrors of electricity the type of bonding that exist is

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

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

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

8.  
At which temperature, a pure semiconductor behaves slightly as a conductor?

9.  
Let nh and ne be the number of holes and conduction electrons in an extrinsic semiconductor. Then

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. Energy bands in solids are a consequence of:

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

13.  
What is a rectifier used for?

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

15. In principle, Boolean algerbra is based on:

16.  
Region without free electrons and holes in a p-n junction is

17. The Voltage gain is highest for

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

19.  
Diffusion current in a p-n junction is greater than the drift
current in magnitude

20. An oscillator is an amplifier with: