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

What term describes the alignment of magnetic minerals in rocks with the Earth’s magnetic field at the time of their formation?

2 / 10

What property of certain rocks makes them suitable for paleomagnetic studies?

3 / 10

What unit is used to measure the strength of a magnetic field?

4 / 10

What is the primary component of the Earth’s magnetic field that is measured in magnetic surveys?

5 / 10

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

6 / 10

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

7 / 10

Which of the following materials is not commonly used in the construction of a magnetometer?

8 / 10

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

9 / 10

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

10 / 10

The region where the Earth’s magnetic field interacts with the solar wind is known as the:

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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

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

2 / 10

What is the primary purpose of magnetic methods in geophysics?

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 does palaeomagnetism contribute to our understanding of plate tectonics?

5 / 10

How do scientists use paleo magnetism to study the past behaviour of the Earth’s magnetic field?

6 / 10

What is the primary advantage of using aeromagnetic surveys in geophysics?

7 / 10

How do scientists use paleomagnetic data to study plate tectonics?

8 / 10

Which geological feature can create a negative magnetic anomaly?

9 / 10

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

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.