The Electric Field of two Point Charges
Sometimes it happens that a thing is more than the sum of its parts. What about two charges? Can their respective electric field behave fundamentally different in some way than just a single charge? In this problem you will learn about two main concepts in electromagnetics - the superposition principle and the dipole.
The Magnetic Field of a Hollow Wire
What happens if we take a wire, drill a hole in it and set some current in motion? Will we encounter a magnetic field?