Question

Neatly draw Electric Field lines for the following point charges and Parallel Plates
1. Two Positive Points separated by distance r
2.Two Negative Points separated by distance r
3. A positive and negative point separated by distance r
4. A single negative point charge
5. A single positive point charge
6. Two parallel plates (one positive and one negative) separated by distance r

Answer 1

Answer:

Neatly draw Electric Field lines for the following point charges and Parallel Plates

1. Two Positive Points separated by distance r

2.Two Negative Points separated by distance r

3. A positive and negative point separated by distance r

4. A single negative point charge

5. A single positive point charge

6. Two parallel plates (one positive and one negative) separated by distance rDrawings using lines to represent electric fields around charged objects are very useful in visualizing field strength and direction. Since the electric field has both magnitude and direction, it is a vector. Like all vectors, the electric field can be represented by an arrow that has length proportional to its magnitude and that points in the correct direction. (We have used arrows extensively to represent force vectors, for example.)

Figure 1 shows two pictorial representations of the same electric field created by a positive point charge Q. Figure 1b shows the standard representation using continuous lines. Figure 1b shows numerous individual arrows with each arrow representing the force on a test charge q. Field lines are essentially a map of infinitesimal force vectors.



Note that the electric field is defined for a positive test charge q, so that the field lines point away from a positive charge and toward a negative charge. (See Figure 2.) The electric field strength is exactly proportional to the number of field lines per unit area, since the magnitude of the electric field for a point charge is E=k|Q|r2E=k|Q|r2 and area is proportional to r2. This pictorial representation, in which field lines represent the direction and their closeness (that is, their areal density or the number of lines crossing a unit area) represents strength, is used for all fields: electrostatic, gravitational, magnetic, and others.



In many situations, there are multiple charges. The total electric field created by multiple charges is the vector sum of the individual fields created by each charge. The following example shows how to add electric field vectors