The diagram shows the electric field lines between two electrical charges P and Q. Which of the following statements about the charges on P and Q is correct?

a. P is positive and Q is negative

b. P is negative and Q is positive

c. P and Q are both positive

d. The charge cannot be determined with only field lines

A

Explanation:

The P is +ve because as you can see the arrows around it are going out. That is what makes P +ve and Q is -ve for the same reason. The arrows are going to it

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )