ECAT Physics Electronics MCQS Online Test

Physics Electronics MCQS Online Test

ECAT Physics Electronics Chapter Online Test

Total Questions: 177
Time Allowed: 60 Minutes
Total Marks: 177
How to Attempt Test: Please choose the right Option in MCQ-type question.
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1. If positive end of battery is connected to p-side and negative end of battery is connected to n-side of diode then

2. The electromagnetic waves emitted by the LC circuit of areal to a transmitting station are of

3. Output voltage in full wave rectification is not smooth. In order to have smooth output voltage

4. A p-n junction has a thickness of the order of:

5. The electrons in the outermost shell of an atom are called

6. When n-p-n transistor is used as an amplifier,

7. At absolute zero, Si acts as

8. Zener breakdown in a semiconductor diode occurs when

9. In a semiconductor, the mobility of holes is

10. Suitable impurities are added to a semiconductor depending on its use. This is due to

11. A substance which have empty conduction band is called

12. The potential difference across the depletion region of silicon is

13. The materials in which valence band and conduction band overlap are called

14. The gain A of the amplifier is of the order of

15. On increasing the reverse bias to a large value in a p-n junction diode current

16. If a signal passing through a gate is inhibited by sending a low into one of the inputs, and the output is HIGH, the gate is a(n):

17. In a PN junction

18. In insulators

19. Conversion of low input a.c. into high output a.c. is called:

20. The part of a transistor which is most heavily doped to produce large number of majority carriers is

21. To obtain a p-type germanium semiconductor, it must be doped with

22. In comma emitter amplifier (lโ‚€/lE) = 0.98, then current gain is

23. The energy band gap is maximum in

24. A junction between p-type material and n-type material is called as

25. The especially designed semiconductor diodes used as indicator lamps in electronic circuits are


 

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