Each of the four diagrams below shows an electric field pattern in a certain region of space (assume that the field is independent of position above and below the drawing's plane).
What is the sign of these fields' divergence at point $P$ on each diagram? (Hint: Draw a cross-sectional view of a small div-meter centered on the point in question, and sketch the electric field vectors at the midpoint of each of the div-meter's four sides in the drawing's plane. Don't worry about how we might create such a field.
-(a)

A) The divergence is positive.
B) The divergence is negative.
C) The divergence is zero.

Question

Each of the four diagrams below shows an electric field pattern in a certain region of space (assume that the field is independent of position above and below the drawing's plane).
What is the sign of these fields' divergence at point $P$ on each diagram? (Hint: Draw a cross-sectional view of a small div-meter centered on the point in question, and sketch the electric field vectors at the midpoint of each of the div-meter's four sides in the drawing's plane. Don't worry about how we might create such a field.
-(a)

A) The divergence is positive. 
B) The divergence is negative. 
C) The divergence is zero.

Quizplus · Accepted Answer

The Answer of Each of the four diagrams below shows an electric field pattern in a certain region of space (assume that the field is independent of position above and below the drawing's plane).
What is the sign of these fields' divergence at point $P$ on each diagram? (Hint: Draw a cross-sectional view of a small div-meter centered on the point in question, and sketch the electric field vectors at the midpoint of each of the div-meter's four sides in the drawing's plane. Don't worry about how we might create such a field.
-(a)

A) The divergence is positive. 
B) The divergence is negative. 
C) The divergence is zero.

Each of the Four Diagrams Below Shows an Electric Field PPP

Each of the Four Diagrams Below Shows an Electric Field $P$