Question

For a partical plane, other than the magnetic meridian , i.e., a vertical plane at some angleθ, with the magnetic meridian,

(1) angle of dip decreases

(2) angle of dip increases

(3) angle of dip remain uneffected

(4) the apparent value of the angle of dip becomes zero

Answer 1

(2) angle of dip increases

For a vertical plane at an angle θ with the magnetic meridian.

Therefore, observed angle of dip δ , in a vertical plane, making an angle θ , with the magnetic meridian, would be

Here δ represents the true value of dip and δ' is the apparent value of dip. For a vertical plane other than magnetic meridian,

Hence the angle of dip : increases