Question:
Match the geophysical methods in Group-I with their associated physical properties in Group-II.
Group-I Group-II P Magnetic 1 Chargeability Q Gravity 2 Electrical conductivity R Magnetotelluric 3 Susceptibility S Induced Polarization 4 Density
Match the geophysical methods in Group-I with their associated physical properties in Group-II.
| Group-I | Group-II | ||
| P | Magnetic | 1 | Chargeability |
| Q | Gravity | 2 | Electrical conductivity |
| R | Magnetotelluric | 3 | Susceptibility |
| S | Induced Polarization | 4 | Density |
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- Magnetic → Susceptibility.
- Gravity → Density contrasts.
- Magnetotelluric → Electrical conductivity (deep structure).
- Induced Polarization → Chargeability (useful for mineral exploration).
- Gravity → Density contrasts.
- Magnetotelluric → Electrical conductivity (deep structure).
- Induced Polarization → Chargeability (useful for mineral exploration).
Updated On: Aug 21, 2025
- P-3, Q-4, R-2, S-1
- P-3, Q-4, R-1, S-2
- P-4, Q-3, R-2, S-1
- P-2, Q-1, R-4, S-3
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The Correct Option is A
Solution and Explanation
Step 1: Recall the principles of each method.
- Magnetic method: Measures variations in the Earth’s magnetic field due to differences in magnetic susceptibility of rocks. → Property: Susceptibility (3).
- Gravity method: Measures gravitational variations caused by subsurface density contrasts. → Property: Density (4).
- Magnetotelluric method: Uses natural variations in electric and magnetic fields to determine subsurface resistivity/conductivity. → Property: Electrical conductivity (2).
- Induced Polarization (IP): Measures temporary build-up of charge in subsurface materials when subjected to an electric field. → Property: Chargeability (1). Step 2: Matching.
\[ P \rightarrow 3, \quad Q \rightarrow 4, \quad R \rightarrow 2, \quad S \rightarrow 1 \] Final Answer: \[ \boxed{\text{(A) P-3, Q-4, R-2, S-1}} \]
- Magnetic method: Measures variations in the Earth’s magnetic field due to differences in magnetic susceptibility of rocks. → Property: Susceptibility (3).
- Gravity method: Measures gravitational variations caused by subsurface density contrasts. → Property: Density (4).
- Magnetotelluric method: Uses natural variations in electric and magnetic fields to determine subsurface resistivity/conductivity. → Property: Electrical conductivity (2).
- Induced Polarization (IP): Measures temporary build-up of charge in subsurface materials when subjected to an electric field. → Property: Chargeability (1). Step 2: Matching.
\[ P \rightarrow 3, \quad Q \rightarrow 4, \quad R \rightarrow 2, \quad S \rightarrow 1 \] Final Answer: \[ \boxed{\text{(A) P-3, Q-4, R-2, S-1}} \]
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