Magnetic Methods

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Quiz on Magnetic Methods

 

You have to face 10 multiple-choice questions each carrying 1 mark. Each question has only one correct answer out of 4 options. Answering all the questions is not mandatory. The quiz will be auto submitted after the timer stops.

 

Total no. of questions: 10
Full marks: 10
Time: 10 Minutes

 

1 / 10

The phenomenon in which Earth’s magnetic field reverses direction over time is called:

2 / 10

The region of Earth’s magnetosphere where charged particles are trapped by the magnetic field is called the:

3 / 10

What is the term for the phenomenon where a magnetic field induces an electric current in a conductor?

4 / 10

What is the term for a line on a magnetic map that connects points of equal magnetic intensity?

5 / 10

Which instrument is commonly used to measure changes in the Earth’s magnetic field?

6 / 10

In which layer of the Earth’s interior does palaeomagnetism provide important information about past magnetic field changes?

7 / 10

What is the term for the deviation between true north and magnetic north?

8 / 10

What is the primary mineral responsible for recording Earth’s magnetic field in rocks?

9 / 10

What is the approximate inclination angle of Earth’s magnetic field at the magnetic poles?

10 / 10

What is the term for the angle between the direction of magnetization in a rock and the horizontal plane?

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Advanced Quiz on Magnetic Methods

 

You have to face 10 multiple-choice questions each carrying 1 mark. Each question has only one correct answer out of 4 options. Answering all the questions is not mandatory. The quiz will be auto submitted after the timer stops.

 

Total no. of questions: 10
Full marks: 10
Time: 10 Minutes

 

1 / 10

Which of the following can cause a magnetic anomaly?

2 / 10

In magnetic surveys, what is the “total magnetic field intensity”?

3 / 10

Which phenomenon occurs when the magnetic minerals in a rock align with the current magnetic field upon cooling below the Curie temperature?

4 / 10

Which of the following is a common application of magnetic surveys in mineral exploration?

5 / 10

How does palaeomagnetism contribute to our understanding of plate tectonics?

6 / 10

What is the significance of magnetic declination in magnetic surveys?

7 / 10

What is the Curie temperature in the context of magnetic methods in geophysics?

8 / 10

What is the role of a base station in a magnetic survey?

9 / 10

Which geological feature can create a negative magnetic anomaly?

10 / 10

What is the primary advantage of using a fluxgate magnetometer in magnetic surveys?

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Introduction

Magnetic methods are geophysical techniques used to study variations in the Earth’s magnetic field caused by the magnetic properties of rocks and minerals. These methods help scientists locate valuable mineral deposits, map geological structures, and study archaeological sites. Using instruments called magnetometers, magnetic surveys measure anomalies in the magnetic field, which indicate the presence of different rock types or buried objects. Non-invasive and efficient, magnetic methods are widely used in mineral exploration, environmental investigations, and even in detecting underground utilities. They provide critical insights into the Earth’s subsurface, helping us unlock its hidden features and resources.