Published On: Wed, Jul 10th, 2019

## Questions with Answers – Electrostatics

Questions:

1. The atom of an element is electrically neutral, with positively charged nucleus surrounded by orbiting, negatively charged electrons?

Yes

2. The positive and negative electric charges repel each other?

No

3. Two electric charges are, positive and negative charges?

Yes.

4. The electric charges can not be transferred from one body to another.

Wrong.

5. The standard unit for electric charge is one coulomb (C)?

Yes.

6. The electron is positively charges?

False

7. The unit one coulomb (1 C) may be derived from Coulomb’s law, according to which the force F between two point charges Q1 and Q2 in free space are separated by distance r?

Yes.

8. The positive in ordinary matter is carried by protons, the negative charge by electrons.

Yes

9. Charges of opposite sign attract each other?

Yes.

10. According to principle of conservation of charge, the net electric charge in an isolated system always remains constant?

Yes.

11. Net charge means the total positive charge minus the total negative charge?

Yes.

12. The nucleus of an atom is composed of protons and neutrons.

Yes.

13. An electric field is a region in which a charge would not acted upon an electric force?

Wrong.

14. Electric filed is a vector quantity whose direction is that of the force on a positive charge?

Yes.

15. An electric field can’t be produced one or more charges?

Wrong.

An electric field may be produced by one or more charges, and it may be uniform or vary in magnitude and/or direction from place to place.

16. Electric lines of forces are a means of describing a force field, such as an electric field , by using imaginary lines to indicate the direction and magnitude of the field.

True.

17. The potential difference between two points in an electric field is the amount of work needed to take a charge of 1 C from one of the points to the other.

Yes.

18. The equation for potential difference is:

V = W/q

where: W – work, q – charge?

Correct!

19. The unit for potential difference is volt (V) i.e.

1 volt = 1 (joule/coulomb)?

Yes true.

20. Applying a potential difference V between two metal plates d (m) apart, the electric field E can be calculated as:

E = V /d ….in V/m.

Yes, that’ true. 