Magnetic Field By A Current Carrying Wire. L = 5.00 cm, and i = 20.0 a. A current carrying wire will experience greater magnetic force in stronger magnetic field.
If you have a loop in which current goes clockwise as seen from top, then it forms a north pole if seen from below. It is a vector quantity that defines the area of influence of the magnet. The magnitude of the force on a wire carrying current i in an arbitrary magnetic field b is f = i l b sin θ, where θ is the smaller angle between the magnetic field and current.