Which of the following statements about electric field lines is true?

In the context of electric field lines, what does the continuous line connecting items in a circuit diagram typically represent?

Which of the following statements about $\mathrm{electric} \mathrm{field} \mathrm{lines}$ is correct?

Draw the field lines for a pair of identical, positive charges.

Draw, approximately, the electric field lines about two point charges, +Q and -3Q, which are a distance ℓ apart.

FIGURE EX24.3 shows a cross section of two infinite parallel planes of charge. Draw this figure on your paper, then draw electric field vectors showing the shape of the electric field.

You’ve hung two very large sheets of plastic facing each other with distance d between them, as shown in FIGURE EX23.19. By rubbing them with wool and silk, you’ve managed to give one sheet a uniform surface charge density ${\eta }_1=-{\eta }_0$ and the other a uniform surface charge density ${\eta }_2=+3{\eta }_0$. What are the electric field vectors at points 1, 2, and 3?

FIGURE EX24.1 shows two cross sections of two infinitely long coaxial cylinders. The inner cylinder has a positive charge, the outer cylinder has an equal negative charge. Draw this figure on your paper, then draw electric field vectors showing the shape of the electric field.