A student says a bead carrying only negative charge is a monopole. Is the student correct?
Every field source you have met is one of two things: a monopole or a dipole. The sort takes one count. One type makes a monopole; two opposite types bound together make a dipole.
A charged sphere carrying only positive charge: one type, so it is a monopole. But a bar magnet: a north pole and a south pole bound together, so it is a dipole.
A metal marble carries only positive charge. Is the marble a monopole or a dipole?
And a rod with positive charge at one end and negative charge at the other: two opposite types bound together, so it is also a dipole. And a lone mass: mass comes in one type, so it is a monopole.
A magnetized screwdriver tip has a north pole and a south pole. Is the tip a monopole or a dipole?
A magnetized nail has a north pole at its head and a south pole at its tip. Is the nail a monopole or a dipole?
The nail carries two opposite poles, bound together in one object.
Two opposite types bound together make a dipole.
The nail is a dipole.
A comet travels alone, carrying mass and no charge. Is the comet a monopole or a dipole?
Pick the source that is a monopole.
A source is sorted as a dipole. Which feature decides the sort?
Idris says any object carrying charge is a monopole. Which source shows Idris is wrong?