Q1
Which geophysical method uses electrical resistivity to study subsurface layers?
A.
Seismic reflection
B.
Electrical resistivity method
AnswerC.
Gravity method
D.
Magnetic method
Answer: Option B
Solution
Answer: Option B
Solution:
Electrical resistivity method involves passing current into the ground and measuring voltage difference.This helps identify variations in subsurface resistivity, useful in detecting water tables, clay layers, and voids.