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MCQ ON BASIC ELECTRONICS PAGE - 1

1.

Which one of the following materials is used for ‘doping’ to prepare P-type semiconductor?

Answer/ Hint      

Answer : C

Explanation :

2.

Which one of the following materials is used for ‘doping’ to prepare N-type semiconductor?

Answer/ Hint      

Answer : C

Explanation :

3.

The function of a diode can be compared with that of a

Answer/ Hint      

Answer : D

Explanation :

4.

The potential difference across a diode is termed as

Answer/ Hint      

Answer : C

Explanation :

5.

A semiconductor element in its pure form is called a… semiconductor and in tis ‘dopped’ form is called a/an… semiconductor

Answer/ Hint      

Answer : C

Explanation :

6.

If a diode shows very high resistance in one direction and a low resistance in the opposite direction then is conditions is

Answer/ Hint      

Answer : A

Explanation :

7.

Silicon diodes are preferred over Germanium diodes because

Answer/ Hint      

Answer : D

Explanation :

8.

Below the breakdown region, the leakage current of a silicon diode is of the order of

Answer/ Hint      

Answer : A

Explanation :

9.

The maximum reverse voltage that a diode can withstand is called

Answer/ Hint      

Answer : B

Explanation :

10.

Diodes are categorized as bipolar device because

Answer/ Hint      

Answer : C

Explanation :

11.

In BY 127, B stands for … and Y stands for

Answer/ Hint      

Answer : B

Explanation :

12.

Two important specifications of a diode are –

Answer/ Hint      

Answer : D

Explanation :

13.

If the secondary voltage of a transformer is fed to a CRO then which one of the following values will appear on the screen

Answer/ Hint      

Answer : D

Explanation :

14.

PIV across each diode of a bridge rectifier is equal to

Answer/ Hint      

Answer : D

Explanation :

15.

The PIV across the diode of an H.W rectifier is equal to

Answer/ Hint      

Answer : C

Explanation :

16.

The disadvantage of an F.W. rectifier as compared with H.W rectifier is

Answer/ Hint      

Answer : D

Explanation :

17.

The current flowing through each diode of a bridge rectifier is equal to

Answer/ Hint      

Answer : A

Explanation :

18.

The main component used in a filter circuit for reducing ripples is

Answer/ Hint      

Answer : A

Explanation :

19.

The forward current of a LED is of the order of

Answer/ Hint      

Answer : C

Explanation :

20.

Which one of the following LED emits an invisible light

Answer/ Hint      

Answer : B

Explanation :

21.

Which one of the following statements is true about a LED

Answer/ Hint      

Answer : D

Explanation :

22.

Which one of the following chemicals is not used for etching a PCB-?

Answer/ Hint      

Answer : C

Explanation :

23.

Etching of a PCB’s circuit side requires about

Answer/ Hint      

Answer : A

Explanation :

24.

The circular rings of copper made on PCBs for providing solder connection s of components are called

Answer/ Hint      

Answer : D

Explanation :

25.

The side of a PCB on which the components are mounted is called

Answer/ Hint      

Answer : D

Explanation :

26.

The phenomenon which causes reverse break down in a Zenner diode is called

Answer/ Hint      

Answer : A

Explanation :

27.

A good quality power supply should not have a load regulation of not more than

Answer/ Hint      

Answer : A

Explanation :

28.

The power dissipation of a Zener diode

Answer/ Hint      

Answer : B

Explanation :

29.

The voltage drop across the series resistor (Vs) in zener voltage regulator is equal to

Answer/ Hint      

Answer : C

Explanation :

30.

The magnitude of current through a zener diode in a zener voltage regulator under full load condition

Answer/ Hint      

Answer : A

Explanation :

31.

A bandpass filter circuit is that which …

Answer/ Hint      

Answer : C

Explanation :

32.

A filter circuit that allows signals  above a particular frequency to pass through it is called a

Answer/ Hint      

Answer : B

Explanation :

33.

What type of fitter circuits are used in graphic equalizers?

Answer/ Hint      

Answer : C

Explanation :

34.

The filter circuit which attenuates or rejects specific band of frequencies is called a

Answer/ Hint      

Answer : B

Explanation :

35.

Which type of fitter is used to block the humming sound of 50 Hz produced by a.c. main?

Answer/ Hint      

Answer : A

Explanation :

MCQ ON BASIC ELECTRONICS PAGE - 1