24. Electric Force & Field; Gauss' Law

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

Draw, approximately, the electric field lines emanating from a uniformly charged straight wire whose length ℓ is not great. The spacing between lines near the wire should be much less than ℓ. [Hint: Also consider points very far from the wire up to 4ℓ \.]

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.

Which of the following statements about electric field strength at a point is correct based on the pattern of electric field lines?

Given a diagram showing a positive point charge $q$ and a dot located near it, which arrow best represents the direction of the electric field vector $\overrightarrow{E}$ at the position of the dot?

Which statement best describes how $\mathrm{electric} \mathrm{field} \mathrm{lines}$ indicate the strength of the $\mathrm{electric} \mathrm{field}$ at a given point?

Electric field lines can never cross. What would crossed electric field lines indicate?