Assume you charge a comb by running it through your hair and then hold the comb next to a bar magnet. Do the electric and magnetic fields produced constitute an electromagnetic wave?
1.Yes they do, necessarily.
2.Yes they do, because charged particles are moving inside the bar magnet.
3.They can, but only if the electric field of the comb and the magnetic field of the magnet are perpendicular.
4.They can, but only if both the comb and the magnet are moving.
5.They can, if either the comb or the magnet or both are accelerating.
5
You might also like to view...
Why are astronauts weightless in the Space Station? You may find it helpful to watch the video "Newton's Laws of Motion."
A) because the Space Station is constantly in free-fall around the Earth B) because the Space Station is traveling so fast C) because there is no gravity in space D) because the Space Station is moving at constant velocity
What is the mass of a mole of oxygen gas?
a. 8.0 g b. 16 g c. 24 g d. 32 g
When discharging a battery, the terminal voltage is ________ the battery emf
A) more than B) less than C) equal to D) zero, as is
A monkey is sitting at the top of a tree 20 m above ground level. A person standing on the ground wants to feed the monkey. He uses a bow and arrow to launch the food to the monkey
If the person knows that the monkey is going to drop from the tree at the same instant that the person launches the food, how should the person aim the arrow containing the food? Air resistance is small enough to be ignored. A) He should aim it at the monkey. B) He should aim it below the monkey. C) He should aim it above the monkey.