Geophysical methods can be classified into passive and active methods. What are the passive methods?

I. Self-potential

II. Induced polarization

III. Seismic refraction

IV. Magnetic

Which factors below affect the variation of the magnetic field?

I. Secular variation

II. Night variation

III. Diurnal variation

IV. Daylight variation

Based on the types of minerals listed below, which one has the highest magnetic susceptibility?

What is the physical parameter measured in induced polarization?

Polarization is induced in ground by two mechanisms during current flow. Over voltage effect occurs by decay in polarization as charges migrate away by

When the current is switched off, the ions at the grain diffuse away into the fluid, gradually reducing the potential to zero within a finite time. This phenomenon is referred to as?

The measurement of IP (Induced Polarization) can be classified into two types. What are these types of IP measurement?

I. Time-domain IP

II. Wavelength-domain IP

III. Frequency-domain IP

IV. Lamda-domain IP

A surface where the gravitational field has an equal value throughout (equipotential surface) is known as what?

The variation of gravity with latitude is caused by what?

Which statement is correct?

I. Mafic rocks more dense than felsic

II. Ultramafic rocks are most dense

III. Sedimentary rock is denser compare to metamorphic rock

IV. Slate is denser than sandstone

Gravimeter can be classified into?

I. Pendulum-based gravimeter

II. Spring-based gravimeter

III. Magnetic-based gravimeter

IV. Electric-based gravimeter

The final result in gravity data processing is known as?

The regional anomaly in gravity data is related to?

I. Basement

II. Petroleum trap

III. Groundwater

IV. Shallow fault