Punjab 10th Class Physics Chapter 7 Basic Electronics Mcqs Test Online

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Question 1 of 20

Physics

1. The process by which electrons are emitted by a hot metal surface is known as:

1.Conduction

2.Thermionic emission

3.Evaporation

4.Boiling

Question 1 of 20

Question 2 of 20

2. Atomic number of silver is 47, the number of its valence electrons would be _________.

1.8

2.2

3.32

4.18

Question 2 of 20

Question 3 of 20

3. If X = A.B, then X is 1 when:

1.A and B are 1

2.A is 1 and B is 0

3.A is 0 and B is 1

4.A or B is 0

Question 3 of 20

Question 4 of 20

4. The particles emitted from a hot cathode surface are:

1.Protons

2.Positive ions

3.Negative ions

4.Electrons

Question 4 of 20

Question 5 of 20

5. Those quantities whose values very continuously or remains constant are called:

1.Scalar quantities

2.Analogue quantities

3.Light quantities

4.Vector quantities

Question 5 of 20

Question 6 of 20

6. Which statement is not true:

1.Amplifier is an analogue circuit

2.Amplifier is not an analogue circuit

3.Microphone converts sound into electric potential

4.Temperature is an analogue quantity

Question 6 of 20

Question 7 of 20

7. AND gate can be formed by using two:

1.OR gates

2.NOR gates

3.NOT gates

4.NAND gates

Question 7 of 20

Question 8 of 20

8. Which statement is not true about semi-conductor:

1.The number of electron can be added according to our requirement

2.They are not good conductors in their purest form

3.They are not of such practical use is this state.

4.Hexavalent impurity is usually added in them

Question 8 of 20

Question 9 of 20

9. Which is the semi conductor:

1.Gold

2.Germanium

3.Iron

4.Silver

Question 9 of 20

Question 10 of 20

10. The branch of applied physics in which we control the flow of electrons using diodes, transistors and other semi conductor devices in order to meet our various requirements is called:

1.Electronics

2.Electricity

3.Mechanics

4.Metaphysics

Question 10 of 20

Question 11 of 20

11. The logical operation performed by this gate is:

1.NAND

2.OR

3.AND

4.NOR

Question 11 of 20

Question 12 of 20

12. The output of a two-input NOR gate is 1 when:

1.A is 1 and B is 0

2.Both A and B are 0

3.A is 0 and B is 1

4.Both A and B are 1

Question 12 of 20

Question 13 of 20

13. The output of an AND gate is only 1 when:

1.Any one of the two inputs is 0

2.Both of its inputs are 1

3.Both of its inputs are 0

4.Anyone of the two

Question 13 of 20

Question 14 of 20

14. The two inputs of a NAND gate are A and B. Its output would be 0 when:

1.A = 1, B = 0

2.A = 1, B = 1

3.A = 0, B = 0

4.A = 0, B = 0

Question 14 of 20

Question 15 of 20

15. A and B are the two input of a NAND gate. Its output would be 1 when:

1.A = 0, B = 0

2.A = 1, B = 0

3.A = 0, B = 0

4.A = 1, B = 1

Question 15 of 20

Question 16 of 20

16. Which is not a true statement?

1.Germanium crystal acts as insulator in its purest form

2.Germanium is the member of 6th group of periodic table

3.Germanium has four electrons is its valence shell

4.Germanium forms covalent bond by sharing four electrons

Question 16 of 20

Question 17 of 20

17. The output of an OR gate would be 0 when:

1.Any one of its two inputs is 1

2.Both of its input are 0

3.Both of its inputs are 1

4.One of its two inputs is zero

Question 17 of 20

Question 18 of 20

18. In a n-type crystal, the majority carriers are:

1.Positron

2.Protons

3.Holes

4.Free electors

Question 18 of 20

Question 19 of 20

19. Which of the following is an insulator?

1.Plastic

2.Copper

3.Silicon

4.Aluminium

Question 19 of 20

Question 20 of 20

20. The output of a NAND gate is 0 when:

1.Any of its inputs is 1

2.Both of its inputs are 1

3.Any of its inputs is 0

4.Both of its inputs are 0

Question 20 of 20

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