Examples of magnets used in daily life

📚 Quick Study Guide

• 🧲 Magnets are materials that produce a magnetic field.
• 🧭 Magnets have two poles: North and South. Opposite poles attract, and like poles repel.
• 💡 Electromagnets are created by passing an electric current through a coil of wire. The strength of the electromagnet can be controlled by varying the current.
• 🌐 The Earth itself acts as a giant magnet, with its magnetic poles near the geographic poles.
• 📏 Magnetic force is measured in Tesla (T).

🧪 Practice Quiz

1. Which of the following is a common application of magnets in daily life?
   1. A. Refrigerators
   2. B. Telescopes
   3. C. Microscopes
   4. D. Ovens
2. How do magnets help in electric motors?
   1. A. By cooling the motor
   2. B. By providing lubrication
   3. C. By creating rotational force
   4. D. By increasing voltage
3. In magnetic resonance imaging (MRI), what role do magnets play?
   1. A. They produce X-rays
   2. B. They align atomic nuclei
   3. C. They filter blood
   4. D. They generate heat
4. Which of these devices commonly uses magnets for data storage?
   1. A. LED Screens
   2. B. Hard drives
   3. C. Light bulbs
   4. D. Batteries
5. What happens when you bring two south poles of a magnet together?
   1. A. They attract
   2. B. They repel
   3. C. They neutralize
   4. D. Nothing happens
6. How are magnets used in maglev trains?
   1. A. To heat the tracks
   2. B. To reduce air resistance
   3. C. To levitate the train
   4. D. To power the engine
7. What is an electromagnet?
   1. A. A naturally occurring magnet
   2. B. A magnet that can be turned on and off
   3. C. A very weak magnet
   4. D. A magnet used in compasses