Question

1. The diagram below shows two negatively charged metal spheres, Sphere A and Sphere B. A positively charged pith ball is placed at the three locations shown.
   Position X Position Position Z Sphere A Negative Sphere B Negative
   a)At each one of the three locations, draw two field vectors, one for each of the two charged spheres. Label each vector as E_A and E_B. For each vector, draw the correct direction of the vector, and an approximate relative length. These vectors represent the force that the electric field exerts on the positive pith ball. b)At each of the three locations, add together the two electric field vectors to show a total field vector. Pay attention to the direction and the relative lengths of the sum vectors. Label each of the sum vectors as E_A + E_B.

2-When the angle of tilt away from the vertical is greater, we say that the force between the charged metal sphere and the pith ball is greater. What part of this statement is an observation, and what part is an inference?

Answer 1

E_A = electric field due to sphere 'A' E_B - electric field due to sphere 'B' at x: - at y: - If 'y' is at mid point between A & B. therefore E_A^vector = -E_B^vector therefore E_y^bar = E_A^bar + E_B^bar = 0 therefore E_y = 0 (null point) at z: - therefore E_z = E_A + E_B C because E_B > E_A) If point is above the axis, the field lines becomes curved lines.