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Chapter 7: Problem 1

All matter contains both positively and negatively charged particles. Why do most things have no net charge?

Short Answer

Expert verified
Answer: Most things have no net charge because their constituent atoms are electrically neutral, with the charges of protons and electrons balancing each other out. This leads to an overall electric charge of zero and electrostatic equilibrium for the object.

Step by step solution

01

1. Understand atomic structure

Atoms are the basic units of matter, and they consist of a nucleus (containing positively charged protons and neutral neutrons) and negatively charged electrons orbiting around the nucleus. Protons and electrons have opposite electric charges: the charge of a proton is +1 elementary charge (denoted as +e), and the charge of an electron is -1 elementary charge (denoted as -e).
02

2. Realize that atoms are usually electrically neutral

In its natural state, an atom is electrically neutral because it has the same number of protons and electrons. The charges of protons and electrons in an atom balance each other out, resulting in a net electric charge of zero.
03

3. Learn about electric charge balance in materials

As mentioned earlier, atoms are usually electrically neutral. When multiple atoms bond together to form a material, the protons and electrons in these atoms also generally balance each other out, leading to a net charge of zero for the material.
04

4. Grasp the concept of electrostatic equilibrium

When the net electric charge of an object is zero, it is in electrostatic equilibrium. In this state, the object does not experience any net electric force or generate an electric field. Most things we encounter in our daily lives are in electrostatic equilibrium because their net charges are balanced and stable.
05

5. Understand why most things have no net charge

Now that we know how atomic structure, electric charge balance, and electrostatic equilibrium work, we can answer the question: most things have no net charge because their constituent atoms are electrically neutral, and the charges of protons and electrons balance each other out. This leads to an overall electric charge of zero and electrostatic equilibrium for the object.

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Most popular questions from this chapter

(a) A negatively charged iron ball (on the end of a plastic rod) exerts a strong attractive force on a penny even though the penny is neutral. How is this possible? (b) The penny accelerates toward the ball, hits it, and then is immediately repelled. What do you think causes the sudden change from an attractive to a repulsive force on contact between the penny and the ball?

A solid metal cylinder has a certain resistance. It is then heated and carefully stretched to form a longer, thinner cylinder. After it cools, will its resistance be the same as, greater than, or less than what it was before? Explain your choice.

EIf electrons are flowing clockwise around an electric circuit, which way is the conventional current flowing in the circuit?

Explain what current, resistance, and voltage are.

Two \(1.5\) -volt batteries are connected in series in an electric circuit. Use the concept of energy to explain why this combination is equivalent to a single 3-volt battery. When connected in parallel, what are two \(1.5\) -volt batteries equivalent to?
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