If a wire carrying current causes the needle of a compass to move:

A. it proves Ohm's law.
B. it demonstrates electromagnetism.
C. it is an example of an open circuit.
D. it disproves Ohm's law.

Question

If a wire carrying current causes the needle of a compass to move:

A.	it proves Ohm's law.
B.	it demonstrates electromagnetism.
C.	it is an example of an open circuit.
D.	it disproves Ohm's law.

anonymous · Answer

@Kainui

fifciol · Answer

What do you think is correct answer?

anonymous · Answer

maybe A??

fifciol · Answer

Ohm's law determines the relation between the voltage and current. Namely it states that current is proportional with voltage. Do you think this experiment proves Ohm's law?

anonymous · Answer

oh maybe D??

fifciol · Answer

you cannot tell that. To prove Ohm's law you should measure the current through and voltage across the wire to figure out the relation between this variables.

anonymous · Answer

im so confused

fifciol · Answer

http://www.nuffieldfoundation.org/practical-physics/oersted-electric-current-and-magnetism see this

fifciol · Answer

it's a well know experiment, I find it the most important of all physics

anonymous · Answer

so its C?

fifciol · Answer

no the wire has to be connected in a loop, otherwise you wouldn't get any current

anonymous · Answer

So B?

fifciol · Answer

yes, this experiment shows the connection between electricity and magnetism so does the electromagnetism

anonymous · Answer

thanks