GATE-2018 (24) :Wyllie – Time average equation

GATE-2016 

45. How are the numerical values of the real and imaginary components of the impedance tensor (Z) in the Magnetotelluric (MT) method related over a homogeneous half-space?

(A)Imaginary component is one-third of the real component.
(B)Imaginary component is half of the real component.
(C)Imaginary component is equal to the real component.
(D)Imaginary component is twice that of the real component. 

Answer: C

Explanation:

(Thanks to Chari for the nice explanation)

1. real fields correspond to the primary field and img fields correspond to secondary fields.

2. Impedance is the ratio of img to real fields

3. Inhomogeneous conditions the ratio should be 1, if there is no conductive body no secondary fields will generate.