Statement-1: Magnetic field lines cannot start from a point nor end at a point.
Statement-2: The line integral of magnetic field induction over a closed path is not zero.

The question given below consist of an assertion (A) and a reason ( R). Use the following key to choose the appropriate answer to these questions from the codes (a), (b), ( c) and (d) given below: (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is NOT the correct explanation of A. (c) A is true but R is false. (d) A is false and R is also false. Assertion: Magnetic lines cannot start from one point nor end at a point. Reason: The line integral of magnetic field induction over a closed path is not zero.

Can a magnetic field line from a closed loop? Explain.

Why are magnetic field lines closed curves ?

According to Ampere's law, the line integral of the magnetic induction around a closed path is directly proportion to the enclosed

Magnetic field lines can netiher emanate from a point nor end on a point. Yet the field lines outside a bar magnet do seem to start from the North pole and end on the South pole. Does the second fact contradict the first? Explain.