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5. Magnetism and matter — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics5. Magnetism and matter1 Mark
MCQ
The angle of dip is the angle
  • A
    Between the vertical component of earth's magnetic field and magnetic meridian
  • B
    Between the vertical component of earth's magnetic field and geographical meridian
  • ✓
    Between the earth's magnetic field direction and horizontal direction
  • D
    Between the magnetic meridian and the geographical meridian
✓

Answer

Correct option: C.
Between the earth's magnetic field direction and horizontal direction
c
(c) The angle of dip is the angle between the direction of the earth's magnetic field and the plane of the horizon

Horizontal component of earth's magnetic field $=B_{H}=B \cos \theta$

Vertical component of earth's magnetic field $=B_{V}=B \sin \theta$

Now, $B \cos \theta=B \sin \theta$

$\Longrightarrow \theta=45^{\circ}$

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