📚 Learning Guide
Electric Fields and Dielectrics
easy

If two charged objects, one with a charge of +3 µC and the other with a charge of -2 µC, are placed 0.5 meters apart, what will be the nature of the force acting between them according to Coulomb's Law?

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Choose the Best Answer

A

The force will be attractive.

B

The force will be repulsive.

C

There will be no force acting between them.

D

The force will be neutral.

Understanding the Answer

Let's break down why this is correct

Answer

According to Coulomb’s Law, the force between two point charges is \(F = k \frac{|q_1 q_2|}{r^2}\). Plugging in \(q_1 = +3\,\mu\text{C}\), \(q_2 = -2\,\mu\text{C}\) and \(r = 0. 5\text{ m}\) gives a positive magnitude of the force, but because the charges are opposite in sign, the force is attractive. The magnitude is \(F = 8. 99\times10^9 \frac{(3\times10^{-6})(2\times10^{-6})}{(0.

Detailed Explanation

Opposite charges attract because electric field lines run from positive to negative. Other options are incorrect because Some people think opposite charges repel; One might think a small difference in charge could make the force vanish.

Key Concepts

Coulomb's Law
Topic

Electric Fields and Dielectrics

Difficulty

easy level question

Cognitive Level

understand

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