Import Question JSON

$\text{Hint: Recall the properties of magnetic field lines.}$ $\text{Explanation: Analyze the diagrams.}$ $\text{(a) Wrong, because magnetic lines of force never emanate from a single point as shown.}$ $\text{(b) Wrong, because magnetic field lines do not cross one another.}$ $\text{(c) Correct, magnetic lines of force are confined within a toroid. Field lines form closed loops as each loop encloses a region across which a current passes.}$ $\text{(d) Wrong, field lines cannot be completely straight. The lines should curve out at the edges and form closed loops.}$ $\text{(e) Correct, around both, the N-pole and S-pole, the net flux of the field is zero.}$ $\text{(f) Wrong, these lines cannot represent a magnetic field because all the field lines cannot emanate from the upper shaded (plate).}$ $\text{(g) Wrong, magnetic field lines between two poles cannot be precisely straight at the ends. Some deviation of lines is inevitable, otherwise, Ampere's law is violated.}$ $\text{Hence, option (4) is the correct answer.}$