Describe how electric fields and magnetic fields are similar and how they are different. An electric field is a field of force, surrounding a charged particle, while a magnetic field is a field of force surrounding a permanent magnet, or a moving charged particle. When a charge is moving, it does not only have an electric field, but a magnetic field as well. This is why electric and magnetic fields are always associated with each other. They are two different fields, but not a totally separate field. Electric and magnetic fields are perpendicular to each other.
- Indicate if each of the following statements is correct or incorrect.
[A] Electric fields are caused by electric charges.
[B] Moving electric charges cause magnetic fields.
[C] Direct electric current is used in transformers.
[D] Most housing is wired using parallel circuits.
How are electric motors and electric generators similar and how are they different?
How does wave speed relate to wave frequency? If the speed of a longitudinal wave is 340 m/s and the frequency is 1000 Hz, what is the wavelength of the wave?
Can sound wave travel through outer space? Why or why not?
What is the fundamental difference between a radio wave and a visible light wave?
What type of waves are light waves?
Give an explanation for why the sky is blue.
What is refraction and how does it occur?