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Magnetism And Matter — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsMagnetism And Matter1 Mark
MCQ
When is the angle of dip at a place equal to 45o?
  • A
    When the vertical and horizontal components of earth’s magnetic field are equal.
  • B
    When the vertical component is twice the horizontal component of earth’s magnetic field.
  • C
    When the vertical component is half the horizontal component of earth’s magnetic field.
  • D
    When either the vertical component or the horizontal components of earth’s magnetic field is equal to zero.
✓

Answer

  1. When the vertical and horizontal components of earth’s magnetic field are equal.

Explanation:

Yes, the angle of dip at a place is equal to 45o, when the vertical and horizontal components of earth’s magnetic field are equal. In this case $\rightarrow δ=45^\circ$

$\tan\delta=\frac{\text{B}_\text{v}}{\text{B}_\text{v}}=1$

So, BV = BH.

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