A group of compasses around a copper wire hooked up to a battery will point in a circle. This is best explained by which statement?
A) The copper in the wire acts like a magnet.
Eliminate
B) All batteries will produce magnetic fields.
C) An electric current in the wire produces a magnetic field.
D) Any charged particle such near a compass destroys its magnetic properties.

Question

A group of compasses around a copper wire hooked up to a battery will point in a circle. This is best explained by which statement?
A)	The copper in the wire acts like a magnet.	
Eliminate
B)	All batteries will produce magnetic fields.	
C)	An electric current in the wire produces a magnetic field.	
D)	Any charged particle such near a compass destroys its magnetic properties.

anonymous · Answer

Ill Give 10000000 Medals :D

niyex · Answer

the right option is C.

reason because A wire carrying electric current will produce a magnetic field with closed field lines surrounding the wire.
Another version of the right hand rules can be used to determine the magnetic field direction from a current—point the thumb in the direction of the current, and the fingers curl in the direction of the magnetic field loops created by it