Question

1)What’s electric charge? 2)Is negative charge really “negative”? 3)You have a negatively charged object. Describe how can you use it to place a net negative and a net positive charge on an insulated metal sphere? 4)Why do we need the concepts Force and Electric field? What are they? 5)Why electric field lines never intersect?

Answer 1

Ans:

1) Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. Electric charges are two types, positive and negative.

2) Negative is just representation. When a petition and electron combines, net charge is zero. They are said to have equal and opposite charges. So, it is mere convention to choose electron as negative and proton as positive. And the electron is not really a negative bad guy.

3) When a negatively charged object bring closer to an insulated metal the positive and negative charges will induce on either side of the metal sphere. The closer end will get induced by positive charge and far end will by negative charge.

4) Electric field is the force experienced per unit charge. Two charges will interact due to the electric fields. When a charge placed in the electric field produced by another charge will experience force.

5) If electric field lines intersect, at the point of intersection the electric field will have two directions means at that point a charge will experience force in two different directions and has to move in two different directions at a time but it is meaning less.