| (i) Magnetic field lines do not intersect because they always travel parallel to each other in North to South direction. |
| (ii) When a current flows through a straight copper conductor, it gets permanently magnetized. |
| (iii) The strength of magnetic field at the centre of a circular coil is inversely proportional to the radius of coil. |
A)
(i)
(ii)
(iii)
T
T
F
B)
(i)
(ii)
(iii)
T
F
T
C)
(i)
(ii)
(iii)
F
F
T
D)
(i)
(ii)
(iii)
F
T
F
Correct Answer: C
Solution :
| (i) The magnetic field lines do not intersect, if they did, the direction of magnetic field would not be unique at the point of intersection. |
| (ii) Copper conductor acts as a magnet as long as current flows through it. |
| (iii) Magnetic field at the centre of circular coil is \[B=\frac{{{\mu }_{o}}l}{2R}.\] |
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