Question

Consider a magnetic dipole kept in the north-south direction. Let $P_1,P_2,Q_1$ and $Q_2$ be four points at the same distance from the dipole towards north, south, east and west of the dipole respectively. The directions of the magnetic field due to the dipole are the same at

• A. $P_1$ and $P_2$
• B. $Q_1$ and $Q_2$
• C. $P_1$ and $Q_1$
• D. $P_2$ and $Q_2$

Answer 1

Answer: (A), (B)

The correct options are
A $P_1$ and $P_2$
B $Q_1$ and $Q_2$

Since, we know that the magnetic field due to a dipole is only in one direction i.e along the magnetic dipole moment,
hence, for points lying along the axis, i.e $P_1$ and $P_2$, will experience a magnetic field along the same direction
For $Q_1$ and $Q_2$ , lying on the equatorial , the magnetic field is again in the direction of the axis of the dipole .