Question:
Match the electromagnetic methods in Group–I with their corresponding frequency range in Group–II.
Group–I:
P. Very Low Frequency
Q. Radio Magnetotelluric
R. Ground Penetrating Radar
S. Control Source Magnetotelluric
Group–II:
1. 10 MHz – 1 GHz
2. 1 Hz – 20 kHz
3. 100 kHz – 1 MHz
4. 15 kHz – 30 kHz
Match the electromagnetic methods in Group–I with their corresponding frequency range in Group–II.
Group–I:
P. Very Low Frequency
Q. Radio Magnetotelluric
R. Ground Penetrating Radar
S. Control Source Magnetotelluric
Group–II:
1. 10 MHz – 1 GHz
2. 1 Hz – 20 kHz
3. 100 kHz – 1 MHz
4. 15 kHz – 30 kHz
P. Very Low Frequency
Q. Radio Magnetotelluric
R. Ground Penetrating Radar
S. Control Source Magnetotelluric
Group–II:
1. 10 MHz – 1 GHz
2. 1 Hz – 20 kHz
3. 100 kHz – 1 MHz
4. 15 kHz – 30 kHz
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Remember:
- VLF \(\approx\) 15–30 kHz.
- RMT \(\approx\) 100 kHz – 1 MHz.
- GPR \(\approx\) 10 MHz – 1 GHz.
- CSMT \(\approx\) 1 Hz – 20 kHz.
Updated On: Aug 22, 2025
- P-4, Q-3, R-1, S-2
- P-4, Q-3, R-2, S-1
- P-2, Q-1, R-4, S-3
- P-1, Q-2, R-3, S-4
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The Correct Option is A
Solution and Explanation
Step 1: Very Low Frequency (VLF).
VLF methods typically use frequencies in the range 15–30 kHz. \[ P \Rightarrow 4 \] Step 2: Radio Magnetotelluric (RMT).
RMT employs radio frequency signals in the range 100 kHz – 1 MHz. \[ Q \Rightarrow 3 \] Step 3: Ground Penetrating Radar (GPR).
GPR generally operates in the frequency band 10 MHz – 1 GHz. \[ R \Rightarrow 1 \] Step 4: Control Source Magnetotelluric (CSMT).
CSMT typically uses low frequency sources in the range 1 Hz – 20 kHz. \[ S \Rightarrow 2 \] Final Matching:
P-4, Q-3, R-1, S-2 \[ \boxed{\text{Option (A)}} \]
VLF methods typically use frequencies in the range 15–30 kHz. \[ P \Rightarrow 4 \] Step 2: Radio Magnetotelluric (RMT).
RMT employs radio frequency signals in the range 100 kHz – 1 MHz. \[ Q \Rightarrow 3 \] Step 3: Ground Penetrating Radar (GPR).
GPR generally operates in the frequency band 10 MHz – 1 GHz. \[ R \Rightarrow 1 \] Step 4: Control Source Magnetotelluric (CSMT).
CSMT typically uses low frequency sources in the range 1 Hz – 20 kHz. \[ S \Rightarrow 2 \] Final Matching:
P-4, Q-3, R-1, S-2 \[ \boxed{\text{Option (A)}} \]
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