Electric Charge, Class 12 Physics NCERT Solutions

1. There will be total 20 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. A material in which electrons are tightly bound and cannot move freely at room temperature is called

  conductors

 superconductors

  semiconductors

 insulators

Question 1 of 20

2. According to the principle of conservation of charge

 charges can be created but it cannot be destroyed

 charges cannot be created but can be destroyed

 the sum of charges in any system is constant

 the algebraic sum of charges in any closed system is constant

Question 2 of 20

3. A coulomb is same as:

 ampere/second

 ampere.second

  ampere/second²

  ampere/meter²

Question 3 of 20

4. When a glass rod is rubbed with silk, it becomes positively charged because

 Protons are transferred to silk

 Electrons are transferred to silk

 Protons are added to it.

  Electrons are added to it.

Question 4 of 20

5. The charge on a glass rod that has been rubbed with silk is called positive:

 so that the proton charge will be positive

 because like charges repel

 to conform to the conventions adopted for G and m in Newton’s law of gravitation

 by arbitrary convention

Question 5 of 20

6. A material in which electrons are loosely bound and can move freely at room temperature is called

 insulator

 superconductor

  semiconductor

  conductor

Question 6 of 20

7. Choose the correct statement

 The total charge particles in the universe remains constant

 The total positive charge of the universe is constant

 The total negative charge of the universe is constant

 The total charge of the universe is constant

Question 7 of 20

8. To make an uncharged object to have a negative charge we must:

 add some electrons

  add some atoms

 remove some atoms

 remove some electrons

Question 8 of 20

9. When conductors are placed in an electric field, their electrons are moved

  May be randomly or in direction of applied field.

 In a direction of applied field

  Randomly in all direction

 Opposite to applied field

Question 9 of 20

10. Quarks are entities that have

  Fractional charges, combination of these are present in protons and neutrons

 integer charges, combination of these are present in protons, electrons and neutrons

 fractional charges, combination of these are present in protons and electrons

 no charge, combination of these are present in protons and electrons

Question 10 of 20

11. A negative ion is an atom that ________ electrons

 is going to loose

 is going to gain

  has gained

 has lost

Question 11 of 20

12. When a hard rubber rod is given a negative charge by rubbing it with wool:

 negative charges are transferred from wool to rod

  positive charges are transferred from wool to rod

 negative charges are transferred from rod to wool

  positive charges are transferred from rod to wool

Question 12 of 20

13. The value of charge on a body which carries 30 excess electrons is

 A

 B

 C

 D

Question 13 of 20

14. The total negative charge in 1 mol of helium (atomic number 2, atomic mass 4) is:

 A

 B

 C

 D

Question 14 of 20

15. When we rub a glass rod with silk, then

  mass of silk decreases

 mass of glass rod and silk increases

 mass of glass rod increases

 mass of glass rod decreases

Question 15 of 20

16. How many electrons are present in 1 coulomb of charge?

 1.6 × 10 ^-19

 6.25 × 10 ¹⁹

 6.25 × 10 ¹⁸

  6.25 × 10 ^-18

Question 16 of 20

17. What does q₁ + q₂ = 0 signify?

 q₁ and q₂ are equal charges

 q₁ and q₂ are equal charges but have opposite sign

 q₁ and q₂ are equal charges and have same sign

 q₁ and q₂ are not equal charges but have same sign

Question 17 of 20

18. A silk cloth rubbed with a glass rod acquire a charge (-1.6 – 10 ^-19) C. Then the charge on the glass rod is

 – 3.2 × 10 ^-19 C

  – 1.6 × 10 ^-19 C

 +1.6 × 10 ^-19 C

 3.2 × 10 ^-19 C

Question 18 of 20

19. To make uncharged object have a positive charge:

  add some electrons

 remove some electrons

  add some neutrons

  remove some neutrons

Question 19 of 20

20. Two glass rods rubbed with silk are placed close to each other. They will

 will attract

 will repel or attract, cannot predict

 neither repel nor attract

 will repel

Question 20 of 20

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