First slide

Earth's Magnetism

Question

At a place on the surface of earth, the dip circle shows reading of 30⁰ and in a plane perpendicular to the initial it gives reading of 45⁰. What is the reading of dip circle at that place in magnetic meridian?

Moderate

A

$60^{0}$
B

$c o t^{- 1} (4)$
C

$c o t^{- 1} (2)$
D

$90^{0}$

Solution

$\begin{array}{rcl} c o t^{2} δ & = & c o t^{2} δ_{1} + c o t^{2} δ_{2} \\ c o t^{2} δ & = & c o t^{2} 30^{0} + c o t^{2} 45^{0} \\ c o t^{2} δ & = & 3 + 1 = 4 \\ δ & = & c o t^{- 1} (2) \end{array}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App