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Magnetic Methods

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 is not a factor affecting the strength of Earth’s magnetic field?

2 / 10

The region where the Earth’s magnetic field lines converge is called the:

3 / 10

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

4 / 10

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

5 / 10

What term describes the process by which rocks acquire a permanent magnetization aligned with Earth’s magnetic field at the time of their formation?

6 / 10

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

7 / 10

What is the name of the instrument used to measure the magnetic properties of rocks in paleomagnetic studies?

8 / 10

What is the term for the study of changes in the Earth’s magnetic field over time?

9 / 10

Which type of rock is typically associated with strong magnetic anomalies due to its high iron content?

10 / 10

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

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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

What causes the auroras (Northern and Southern Lights) in Earth’s atmosphere?

2 / 10

How does palaeomagnetism contribute to our understanding of plate tectonics?

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

How can magnetic methods be used to study ancient human activities?

5 / 10

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

6 / 10

What is the primary advantage of using magnetic surveys in unexplored regions?

7 / 10

What does the term “magnetic susceptibility” refer to in geophysics?

8 / 10

How can magnetic methods help in identifying fault zones?

9 / 10

Which geological feature can create a negative magnetic anomaly?

10 / 10

What is the primary purpose of magnetic methods in geophysics?

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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.

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