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Question: Answered & Verified by Expert
At a location, the horizontal component of the earth's magnetic field is $0.3 \mathrm{G}$ in the magnetic meridian and the dip angle is $60^{\circ}$. The earth's magnetic field at this location in $G$ is
PhysicsMagnetic Properties of MatterTS EAMCETTS EAMCET 2018 (05 May Shift 1)
Options:
  • A 0.3
  • B 0.6
  • C 0.9
  • D 1.2
Solution:
2433 Upvotes Verified Answer
The correct answer is: 0.6
Using, $\beta_H=B \cos \delta$, we get
$\begin{aligned}
& 0.3=B \cos 60^{\circ} \\
& 0.3=B \times \frac{1}{2} \text { or } B=0.6 \mathrm{G}
\end{aligned}$

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