When a solenoid attracts an iron bar,?
A. They leave the south pole to go around to the north pole
B. They leave the north pole to go around to the south pole
C. They leave the north pole to go to infinity
D. They leave the south pole to go to the infinity
Answer:B
When a solenoid attracts an iron bar,?
A. They leave the south pole to go around to the north pole B. They leave the north pole to go around to the south pole C. They leave the north pole to go to infinity D. They leave the south pole to go to the infinity