What are some ways gel electrophoresis can separate fragments?

Question

i need help with bio homework

Answer 1

the current traveling through the gel pulls the segment's apart to accurately tell their ion concentration

Answer 2

When you run gel elctrophoresis the DNA iis pulled through a jelly like substance(cant remember its name) by electricity. The jelly like stuff is like honeycomb on a microscopic scale, and so the smaller pieces of DNA can move through it faster than the longer bits.