Question

1.4 [2pt] Consider two positive point charges Q at a distance 2 R from each other. Sketch electric field lines including their direction.

1.4 ANSWER

1.5 [ 3pt] In problem 1.4, calculate electric fields (i) at a distance R to the left of the left charge, (ii) at a distance R to the right of the right charge, and (iii) at the mid-point between the two charges. Assume Q = 1C and R = 1m.

1.5 ANSWER(s)

1.6 [3pt] Same question as in problem 1.5 but make the left charge negative.

1.6 ANSWER(s)

1.7 [2pt] Consider a rhombus with equal sides and point charges +Q, +Q,-Q,-Q in the four corners. Sketch the electric field lines (this structure is called quadrupole)

1.7 ANSWER

Answer 1