Question

Choose the statement(s) that is/are true of a magnetic field.
(i) A magnetic needle placed in a magnetic field will align in thedirection of the field.
(ii) Magnetic field lines start at the north pole and end at thesouth pole.
(iii) A commonly used unit for measuring magnetic field is thegauss (G).
(iv) The SI unit for magnetic field is the tesla (T) and it is thesame as N.A^-1.m^-1