Consider four objects: a, b, c, and d. if a is negatively charged and b and c attract a but repel each other, what is the charge on b and c?

a. both b and c are positively charged.

b. both b and c are negatively charged.

c. b is positively charged and c is negatively charged.

d. b is negatively charged and c is positively charged.

e. both b and c have no charge.

The correct answer is "Both B and C are positively charged".

Explanation:

Same charges repel each other. There is an electrostatic force of repulsion between the same charges.

Unlike charges attract each other. There is an electrostatic force of attraction between the opposite charges.

In the given problem, consider four objects: A, B, C, and D. If A is negatively charged and B and C attract A but repel each other.

In the given question, B and C repel each other. It means that both B and C have same charge. A is negatively charged. Then, B and C have positive charge. As B and C attract A. Both B and C are positively charged.

Therefore, the option (B) is correct.

small = small current large mag large current