Question

Why is repulsion better than attraction when determining the poles

Answer 1

\(\Huge{\color{purple}{\textbf{W}} \color{orange}{\cal{E}} \color{green}{\mathbb{L}} \color{blue}{\mathsf{C}} \color{maroon}{\rm{O}} \color{red}{\tt{M}} \color{gold}{\tt{E}} \space \color{orchid}{\mathbf{T}} \color{Navy}{\mathsf{O}} \space \color{OrangeRed}{\boldsymbol{O}} \color{Olive}{\mathbf{P}} \color{Lime}{\textbf{E}} \color{DarkOrchid}{\mathsf{N}} \color{Tan}{\mathtt{S}} \color{magenta}{\mathbb{T}} \color{goldenrod}{\mathsf{U}} \color{ForestGreen}{\textbf{D}} \color{Salmon}{\mathsf{Y}} \ddot \smile }\)

[One moment please...]

Answer 2

The force between two wires, each of which carries a current, can be understood from the interaction of one of the currents with the magnetic field produced by the other current. For example, the force between two parallel wires carrying currents in the same direction is attractive. It is repulsive if the currents are in opposite directions. Two circular current loops, located one above the other and with their planes parallel, will attract if the currents are in the same directions and will repel if the currents are in opposite directions.

Answer 3

suppose, you have one charged body, and one uncharged body...say it is positively charged...now u bring them close to each other...the uncharged body will be charged by induction...developing negative charge in the near end and positive charge on the far end...thus, the charged body and the uncharged body will attract each other...bt u won't be able to say that the body was uncharged or negatively charged....
bt if u bring a positve charged body near another positive charged body, they'll repel each other...and u'll be sure that it is positively charged...
thats y repulsion is the surer test for identification of poles....