Question

Which pair of objects will have a repulsive electric force?

Pair Object 1 Charge Object 2 Charge
A +3 +1
B +3 –1
C –1 +2
D -2 +1

(1 point)
Responses

Pair B
Pair B

Pair D
Pair D

Pair A
Pair A

Pair C

Answer 1

To determine which pair of objects will have a repulsive electric force, we need to recall that like charges repel each other, while opposite charges attract.

Let's analyze the pairs:

- **Pair A:** Object 1: +3, Object 2: +1 (Both are positive charges) - **Repulsive force**
- **Pair B:** Object 1: +3, Object 2: -1 (Positive and negative charges) - **Attractive force**
- **Pair C:** Object 1: -1, Object 2: +2 (Negative and positive charges) - **Attractive force**
- **Pair D:** Object 1: -2, Object 2: +1 (Negative and positive charges) - **Attractive force**

The only pair with a repulsive electric force is **Pair A**.

So the correct answer is:

**Pair A**.