Question

(17) The plane makes an angle of 20° with the magnetic
meridian at a given place. The dip angle in this plane is 30°.
When this plane is rotated through 90° and dip is measured it is
found to be 60°. Find true dip angle.​

Answer 1

Answer:

True angle of dip is 28.5 degree

Explanation:

As we know that

$B_v = B sin30$

$B_h cos20 = Bcos30$

now we have

$\frac{B_v}{B_h cos20} = tan 30$

$tan\delta = tan30 cos20$

now we have

$tan\delta = 0.54$

$\delta = tan^{-1}(0.54)$

$\delta = 28.5 degree$

#Learn

Topic : Angle of dip

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