(i) Explain why it would not be possible to write the magnetic Field (B-field) in terms of a vector potential (A) IF magnetic monopoles existed.
(ii) For an electrostatic field (E-field), define the electrostatic potential (Fi), and explain CONCISELY what is meant by a field line and an equipotential surface.
(iii) At what angle do field lines and equipotential surfaces generally intersect? Briefly explain your answer.
Please help me with the three questions at above.