Physics Electronics Test Online Preparation Mcqs With Answer

Physics Electronics Test Online Preparation Mcqs With Answers Start Below

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Question 1 of 15

1. In forward bias the width of potential barrier _______.

A. Increases

B. Decreases

C. No effect

D. Remain same

Question 1 of 15

Question 2 of 15

2. On increasing the reverse bias to a large value in a pn junction diode, the current

A. Increases slowly

B. Decreases slowly

C. Increases suddenly

D. Remains fixed

Question 2 of 15

Question 3 of 15

3. Semi conductor with donor atoms and free electrons belong to the type ______.

A. mix

B. p

C. n

D. any of above

Question 3 of 15

Question 4 of 15

4. The simplest type of rectification known as half wave rectification is obtained by _______.

A. Suppressing half wave of A.C supply by using diode

B. Using a transistor

C. Using a coolidge tube

D. Suppressing the harmonics in A.C voltage

Question 4 of 15

Question 5 of 15

5. The operation of a transistor requires _________.

A. That the emitter be heated

B. That the base be heated

C. None of the above

D. That the collector be heated

Question 5 of 15

Question 6 of 15

6. In p-n-p transistor, the collector current is _______.

A. Greater than emitter current

B. Slightly less than emitter current

C. Equal to emitter current

D. Any of above

Question 6 of 15

Question 7 of 15

7. The device used for conversion of D.C to A.C is called

A. Inverter

B. Oscillator

C. Converter

D. Amplifier

Question 7 of 15

Question 8 of 15

8. NAND gate is a combination of

A. NOT gate and NOT

B. OR gate and NOT gate

C. AND gate and NOT gate

D. AND gate and OR gate

Question 8 of 15

Question 9 of 15

9. p-n junction when reversed biased acts as a ________.

A. Inductor

B. on switch

C. Capacitor

D. off switch

Question 9 of 15

Question 10 of 15

10. In the transistors schematic symbol, the arrow _______.

A. is located on the collector

B. points from north to south

C. is located on the base

D. is located on the emitter

Question 10 of 15

Question 11 of 15

11. Diode can work as

A. Oscillator

B. Rectifier

C. Transformer

D. Generator

Question 11 of 15

Question 12 of 15

12. Identify the correct statement about minority carries

A. Free electrons in n-type and p-type

B. Holes in n-type and p-type

C. Free electrons in n-type and holes in p-type

D. Holes in n-type and free electrons in p-type

Question 12 of 15

Question 13 of 15

13. In p-type semiconductor the majority and minority charge carries are

A. Electrons and holes

B. Holes and electrons

C. Holes and protons

D. Electrons and protons

Question 13 of 15

Question 14 of 15

14. In case of full wave rectifier the rectified D.C has a.c ripples. The ripple frequency is

A. Half than frequency of input A.C

B. Same that of input A.C

C. Twice than frequency of input A.C

D. Four times the frequency of input A.C

Question 14 of 15

Question 15 of 15

15. An OP-AMP comparator is a circuit that compares the signal voltage on one of its inputs with a:

A. Virtual input

B. Output

C. Reference voltage on the other

D. Non-inverting voltage at output

Question 15 of 15

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Physics Electronics Test Online Preparation Mcqs

Physics Electronics Test Online Preparation Mcqs With Answers Start Below

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