Two identical coils are placed coaxially. They carry equal currents in same direction
NOTE in parts (a), (b) and (c) exclude the points at infinity.

Options

A. on their axis there are two points where net magnetic field is zero
B. on their axis there are three points where net magnetic field is zero
C. on their axis there is no such point where net magnetic field is zero
D. on moving from the centre of one coil to the other, magnetic field will first decrease then increase

Answer

c