1) In the induced emf formula in Faraday law, which is given by Eamg = -N° ФР the magnetic dt flux of , is actually the sum of external magnetic flux g.r due to the external magnetic flux 3,ext density of B and internal magnetic flux 4, due to the induced magnetic flux density of Bnd - In most of the questions (even the ones solved in theoretical and problem-solving hours of this course), the contribution coming only from external magnetic flux is considered such that the contribution of internal magnetic flux is ignored. However, these questions should not make a misunderstanding that induced emf depends on time derivative of only external magnetic flux. Consider very long solenoid with radius of a = 1 cm, h = 0.2 m and N=200 turns. The conductor wires of the solenoid have no resistances, which can be physically possible with superconducting wires. The external magnetic flux density, which exist only inside the solenoid, is given by h B (t) = 5 cos(20007t)â̟ mWb / m² . The environment is free-space.

1) In the induced emf formula in Faraday law, which is given by Eamg = -N° ФР the magnetic dt flux of , is actually the sum of external magnetic flux g.r due to the external magnetic flux 3,ext density of B and internal magnetic flux 4, due to the induced magnetic flux density of Bnd - In most of the questions (even the ones solved in theoretical and problem-solving hours of this course), the contribution coming only from external magnetic flux is considered such that the contribution of internal magnetic flux is ignored. However, these questions should not make a misunderstanding that induced emf depends on time derivative of only external magnetic flux. Consider very long solenoid with radius of a = 1 cm, h = 0.2 m and N=200 turns. The conductor wires of the solenoid have no resistances, which can be physically possible with superconducting wires. The external magnetic flux density, which exist only inside the solenoid, is given by h B (t) = 5 cos(20007t)â̟ mWb / m² . The environment is free-space.