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

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

3 / 10

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

4 / 10

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

5 / 10

In what type of rocks can paleo magnetism provide evidence of past continental positions?

6 / 10

What is the primary source of Earth’s magnetic field?

7 / 10

Which type of rocks are commonly used in paleomagnetic studies due to their ability to preserve ancient magnetic information?

8 / 10

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

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

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

2 / 10

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

3 / 10

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

4 / 10

Which of the following can cause a magnetic anomaly?

5 / 10

What is the primary objective of a ground magnetic survey?

6 / 10

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

7 / 10

What does the term “Paleo intensity” refer to in Palaeomagnetism?

8 / 10

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

9 / 10

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

10 / 10

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

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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.