Electrical Field Mapping Experiment 1. Describe a uniform electric field. 2. Exp

Question

Electrical Field Mapping Experiment

1. Describe a uniform electric field. 2. Explain a practical method to create a uniform electric field. 3. In the electrode configuration of Figure 3-a, notice that the equipotential lines are circles which are closer to each other near the point terminal. Explain. (Hint: refer to the relation of the electric field around a point charge, and the relation where AV'is the difference in potential between any two points, and Ax is the distance between them.) 4. In principle, how many equipotential lines can be drawn between a pair of electrodes? What factors limit the number of equipotential lines that can be drawn experimentally?

Explanation / Answer

Answer: 1

Uniform Electric Field is defined as the electric field which is uniform in the whole region of our study. The electric field does not change with respect to distance and it does not follow the electric field gradient. The electric field gradient in the uniform electric field is zero. Thus the uniform electric field is the electric field which has equal electric field intensity at every point in the influence region of the uniform electric field.

For example equi-potential surface has equal potential at every point and hence the electric field is uniform at every point.

Answer 2:

Let the uniform electric field is created by placing positive charges on one side of a parallel line and negative charges are placed at another parallel line. Then the electric field developed between these two parallel lines is uniform electric field. The electric field intensity between the two parallel charge lines is uniform and same at every points.

Test Charge - If we place any test charge in half of the distance from the parallel lines, then the test charge will be pulled at the line which has opposite charge.

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