Examples of Electric Charge in Real Life: Static Electricity and More

📚 Quick Study Guide

• ⚛️ Electric charge is a fundamental property of matter that causes it to experience a force when placed in an electromagnetic field.
• ➕ There are two types of electric charge: positive and negative.
• ⚡ Like charges repel each other, and opposite charges attract.
• 📏 The SI unit of electric charge is the Coulomb (C).
• 💡 Charge is quantized, meaning it exists in discrete units (multiples of the elementary charge, $e = 1.602 \times 10^{-19}$ C).
• ✨ Static electricity is the buildup of electric charge on the surface of an object.
• 🚗 Examples of electric charge in real life include static cling, lightning, and the operation of electronic devices.
• 🔎 Coulomb's Law describes the force between two point charges: $F = k \frac{|q_1q_2|}{r^2}$, where $k$ is Coulomb's constant, $q_1$ and $q_2$ are the magnitudes of the charges, and $r$ is the distance between them.

🧪 Practice Quiz

1. What is the SI unit of electric charge?
   1. Ampere
   2. Volt
   3. Coulomb
   4. Ohm
2. Which of the following statements is true regarding electric charges?
   1. Like charges attract each other.
   2. Opposite charges repel each other.
   3. Positive charges repel each other.
   4. Neutral charges attract each other.
3. What phenomenon is caused by the buildup of electric charge on a surface?
   1. Electromagnetism
   2. Static electricity
   3. Electrolysis
   4. Induction
4. What is the value of elementary charge (e)?
   1. $9.11 \times 10^{-31}$ C
   2. $1.602 \times 10^{-19}$ C
   3. $6.626 \times 10^{-34}$ C
   4. $3.0 \times 10^{8}$ C
5. According to Coulomb's Law, what happens to the force between two charges if the distance between them is doubled?
   1. It doubles.
   2. It quadruples.
   3. It halves.
   4. It is reduced to one-fourth.
6. Which of the following is an example of static electricity in real life?
   1. A running fan
   2. A lightning strike
   3. A compass pointing north
   4. An electric generator
7. What type of force exists between a proton and an electron?
   1. Repulsive
   2. Attractive
   3. Neutral
   4. Gravitational