If the magnetic field is fixed in time and the conducting loop moves through the field, the magnetic flux Φ B linking the loop can change in several ways. For example, if the B -field varies with position, and the loop moves to a location with different B -field, Φ B will change. Alternatively, if the loop changes orientation with respect to the B -field, the B ⋅ d A differential element will change because of the different angle between B and d A, also changing Φ B. As a third example, if a portion of the circuit is swept through a uniform, time-independent B -field, and another portion of the circuit is held stationary, the flux linking the entire closed circuit can change due to the shift in relative position of the circuit's component parts with time (surface ∂Σ(t) time-dependent). In all three cases, Faraday's law of induction then predicts the EMF generated by the change in Φ B.