How are electricity, magnetism and gravity similar?

Question

how are electricity, magnetism and gravity similar?

A. forces which can either attract or repel

B. forces which act at a distance

C. forces which become much stronger with distance

D. all of these

Answer 1

Think!

It can not be D (all of these) because it can not be C either, so it leaves you with A or B.

It can not be A because gravity does not repel.

So it leaves you with B.

The distance can be extremely tiny.

Answer 2

electricty is not  a force, electricty produces a charge and can create magnetism.

none of these answers are correct unless you take electricty as a form of magnetism. in which case A would be the correct answer. (yes gravity can repel depending on an objects motion

becuase electromagetism does not act over large distances

no force becomes stronger with distance (unless its distance in the sence of closeness)

and since B and C are incorrect D cannot be correct

Answer 3

B. forces which act at a distance

Answer 4

I would say B, because the three are only related mathematically and each formula has distance in the equation.  According to physics, gravity is not related to electricity or magnetism in any way.

I wouldn't say A, because electricity and magnetism attract AND repel yet gravity only attracts.

I wouldn't say C, because in all three forces "strength", or magnitude, is inversely proportional to distance (more distance means less strength).  Also, gravity and electricity fall of at the same factor of the distance squared while magnetism falls off at a factor of the distance.  I wouldn't say that a one-to-one ratio is "much stronger"

However, D could be the right answer because C doesn't specify more or less distance and A could mean "attract and/or repel" and not "attract or repel".  

It sounds like your teacher has poor logic skills.