Across
- 1. the point at either end of a magnet where the magnetic field is strongest
- 3. a combination of electric and magnetic fields of force
- 5. a material that allows the flow of electricity, heat, or light
- 9. where electrons are deficient, leading to a positive charge
- 11. a form of radiation that travels through the universe
- 12. the end of a battery of magnet that has a negative electrical charge
- 13. an instrument for detecting or measuring a small electric current by movements of a magnetic needle or of a coil in a magnetic field
- 14. the flow of electric charge, usually electrons, through a conductor
- 15. emit energy on the form of rays or waves
- 17. an atom or group of atoms that has an electric charge
- 18. the area or group of atoms that has an electric charge
- 19. a device that changes mechanical energy into electrical energy
- 20. a material that prevents or reduces the flow of electricity, heat, or sound
Down
- 2. the process of creating an electric current in a conductor by moving it through a changing magnetic field
- 4. A Force by which one object attracts another, such as the gravitational or electrostatic force.
- 6. an electrical charge on an object that occurs when it has more electrons than protons
- 7. an electrical charge on an object that occurs when it has more protons than electrons
- 8. a form of energy that travels in waves, including visible light, radio waves, microwaves and x-rays
- 10. an invisible shield that protects Earth from radiation from the sun
- 16. the force exerted by magnets when they attract or repel each other