Positive charge +Q is uniformly distributed on the upper half of a rod and a negative charge -Q is uniformly distributed on the lower half. What is the direction of the electric field at point P, on the perpendicular bisector of the rod?
A) $\uparrow$
B) $\downarrow$
C) $\leftarrow$
D)$\rightarrow$

Question

Positive charge +Q is uniformly distributed on the upper half of a rod and a negative charge -Q is uniformly distributed on the lower half. What is the direction of the electric field at point P, on the perpendicular bisector of the rod? 
A) $\uparrow$ 
B) $\downarrow$ 
C) $\leftarrow$ 
D)$\rightarrow$

Quizplus · Accepted Answer

The electric field due to each half of the rod is along the perpendicular bisector towards the other side. Therefore, the total electric field at point P is downwards, as the negative charge dominates the positive charge. Thus, the correct choice is option B where the arrow points downwards.

Positive Charge +Q Is Uniformly Distributed on the Upper Half ↑\uparrow↑

Positive Charge +Q Is Uniformly Distributed on the Upper Half $\uparrow$