Question

which pair of objects will have an attractive electric force?
object charge pairs and electric force type
pair\tobject 1 charge\tobject 2 charge
a\t-2\t-1
b\t-3\t+1
c\t+3\t+1
d\t+1\t+2
(1 point)
○ pair a
○ pair d
○ pair c
○ pair b

Explanation:

Step1: Recall Charge Interaction Rule

Opposite charges attract, like charges repel. So we need to find the pair with one positive and one negative charge.

Step2: Analyze Each Pair

• Pair A: Both -2 and -1 (negative, like charges → repel)
• Pair B: -3 (negative) and +1 (positive) → opposite charges → attract
• Pair C: Both +3 and +1 (positive, like charges → repel)
• Pair D: Both +1 and +2 (positive, like charges → repel)

Answer:

B. Pair B