Question

which model represents the field lines around two negative ions?

Explanation:

To determine the correct model for field lines around two negative ions, we use the rules of electric field lines:

1. Electric field lines point toward negative charges (since field lines start from positive and end at negative).
2. Like charges (both negative) repel, so their field lines should not connect between them; instead, the field lines around each negative ion should point toward the ion, and the lines between the two negative ions should show repulsion (field lines from one negative ion should not point to the other, as both are negative—field lines around negative charges point inward, and between two negative charges, the field lines should curve away from the region between them, showing repulsion).

Looking at the options:

• The top-right and bottom-right options show field lines between the two negative ions that curve away (consistent with repulsion) and point toward each negative ion (consistent with negative charges).
• The top-left and bottom-left options show field lines connecting the two ions (which would be for opposite charges, like positive and negative, as field lines connect opposite charges).

Among the right-side options, the top-right has arrows pointing toward the negative ions (correct for negative charges) and the field lines between them curve away (showing repulsion). The bottom-right may have arrow direction issues, but the top-right (or the one with arrows toward the ions and repelling field lines) is correct. Typically, the model with field lines pointing toward each negative ion (inward) and the lines between them curving away (repulsion) is the correct one (e.g., the top-right or the one with arrows toward the ions and repelling field lines).

Answer:

The model with field lines pointing toward each negative ion (inward) and the field lines between the two ions curving away from each other (showing repulsion), e.g., the top - right or the appropriate repelling - negative - ion field - line model (depending on arrow direction; the one with arrows toward the ions and repelling field lines between them).