A long wire that carries a current is bent into a solenoid with upward current in the front looking. If the observer could "see" the magnetic field inside this arrangement of solenoid from the right side, how would it appear?

Question

A long wire that carries a current is bent into a solenoid with upward current in the front looking. If the observer could "see" the magnetic field inside this arrangement of solenoid from the right side, how would it appear?
a) The observer would "see" a north pole
b) The observer would "see" a south pole
c) The observer would "see" an upward north pole 
d) The observer would "see" a downward north pole

bobpursley · Answer

"upward current in the front looking" ? Just take your right hand, wrap it aound the wire, thumb in the direction of + current flow, B will be in the direction of the fingers.