A compass has wire wound over its face and around its back side. What type of instrument is this and what is it used for?

A.
It is a simple electromagnet that can detect the magnetic field in the wire.

B.
It is a simple voltmeter that can measure the number of electrons in the wire.

C.
It is a simple electrical meter that can measure the resistance in the wire.

D.
It is a simple galvanometer that can detect current in the wire.

i think A or D

Question

A compass has wire wound over its face and around its back side. What type of instrument is this and what is it used for?	
 
 A.
It is a simple electromagnet that can detect the magnetic field in the wire.
 
 B.
It is a simple voltmeter that can measure the number of electrons in the wire.
 
 C.
It is a simple electrical meter that can measure the resistance in the wire.
 
 D.
It is a simple galvanometer that can detect current in the wire.

i think A or D

mysticfury · Answer

@Rinibunny @agent0smith

agent0smith · Answer

Running a current through the wire would create a magnetic field and electromagnet so i guess that