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Permanent Magnets — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsPermanent Magnets1 Mark
MCQ
Consider a magnetic dipole kept in the north to south direction. Let $P_1, P_2, Q_1, Q_2$ 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:
  • ✓
    $P_1$ and $P_2$
  • B
    $Q_1$ and $Q_2$
  • C
    $P_1$ and $Q_1$
  • D
    $P_2$ and $Q_2$
✓

Answer

Correct option: A.
$P_1$ and $P_2$
We know that magnetic field lines are directed from the north pole to the south pole. From the given figure, we can say that the direction of magnetic field $\overrightarrow{\text{B}}$ is the same only at points $P_1$ and $P_2$ and at points $Q_1$ and $Q_2$.

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