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Geological Engineering · Q5

Geophysical Methods in Engineering

Engineering and GATE · Geological Engineering · question 5

Q5

Which of the following is a passive geophysical method?

A.
Electrical resistivity survey
B.
Magnetic survey
Answer
C.
Induced polarization
D.
Seismic refraction

Answer: Option B

Solution

Answer: Option B
Solution:
Magnetic surveys are passive as they record natural magnetic field variations without injecting any energy into the ground.