Interactive - Unit 2. Lesson 1. Electric fields and electric field lines

In the video below you will have a chance to reinforce your knowledge of electric fields and electric field lines. Watch the video carefully and then develop the activities. I. Complete the text with information from the video Electric field lines allow us to visualize the electric field around a charge or around a group of charges. Another name for these lines is lines of force. When we draw the electric field lines, we can figure out how a positive charge q can be pushed away from the electric field E of that charge. And because the charge exerts a force on the smaller charge we think of these lines as lines of force.Although scientist today do not think that there some microscopic filaments or something going away from the charge, we still draw the lines because they help us picture out the strength or intensity and the direction of the electric filed.When the intensity of the field is small we draw fewer lines but when the intensity of the field is big, that is we have more charge, we draw more lines. The result of this is that in the stronger field the lines get bunched closer together.Another thing to take into account when you draw force lines is that the lines always point away from the positive charge and towards the negative charge. This is because the direction of the electrric field is defined as the direction of the force the field will exert on a positive test charge. Although that test charge is imaginary, you can think of it as a very small particles such as a proton located at some point in the region of the electric field. II. Choose the correct options.1. Several electric field line patterns are shown in the diagrams below. Which of these patterns are incorrect? Mark all the ones that apply. Diagram A Diagram B Diagram C Diagram D Diagram E 2. Dorian drew this diagram in physics class. What is wrong with the diagram? The lines are not correctly spaced The lines are too long The lines intersect The liines do not have the correct direction III. Write "positive" and "negative" in the correct charge. Do not use capital letters. positive negative