Question

16. Explain: Conductors and Insulators. 17. Define the term: Conservation of charge 18. Draw electric field lines for a positive and negative charge 19. Write notes on electric field. 20. Write short notes electric field.

Answer 1

16)Conductor- Conductors are the material in which the current can flow easily.They can conduct electricity because they allow electron to flow easily inside them from atom to atom.Example- metals

Insulators- Insulators are the material which resists or dont allow the current to flow through them.Example- wood

17) Conservation of charge- It is the principle that the total electric charge in an isolated system never changes.Charge can neither be created nor be destroyed, it can only be transferred from one system to other.

18) Electric field lines moves from the charge in case of positive charge while it moves inward in case of negative charge.

19) Electric field- An electric field is the region of space around an electrically charged object in which an electric charge would feel force. Mathematically, it is defined as the force per unit charge.it is vector quantity and can be visualized as arrows going towards or away from the charges.

                                            where, k is coulomb's constant, q is charge, r is distance between the charges.

9 E=k- 2

20) It is same ques as 19.

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