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Earth’s Magnetism

Physics ⇒ Electricity and Magnetism

Earth’s Magnetism starts at 9 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Earth’s Magnetism. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 11
A compass is taken to a place where the angle of dip is 0°. In which direction will the compass needle point?
At a certain location, the angle of dip is 45° and the horizontal component of the Earth’s magnetic field is 0.25 G. Calculate the vertical component of the Earth’s magnetic field at that location.
At a certain place, the total intensity of the Earth’s magnetic field is 0.4 G and the angle of dip is 60°. What is the value of the horizontal component?
Define magnetic declination.
Describe the difference between the geographic and magnetic poles of the Earth.
Explain the significance of the horizontal component of the Earth’s magnetic field for navigation.
Explain why the magnetic field inside the Earth is believed to be due to the movement of molten iron in the outer core.
If the angle of dip at a place is 90°, what can you say about the location?
State the dynamo theory of the origin of Earth’s magnetic field.
The angle of dip at a place is 30°. If the total intensity of the Earth’s magnetic field is 0.5 G, what is the value of the vertical component?
The horizontal component of the Earth’s magnetic field at a place is 0.22 G and the angle of dip is 60°. Calculate the total intensity of the Earth’s magnetic field at that place. (Use G = gauss)
The horizontal component of the Earth’s magnetic field at a place is zero. What is the angle of dip at that place?
The value of the horizontal component of Earth’s magnetic field at a place is 0.3 G and the total intensity is 0.5 G. Find the angle of dip at that place.
What is the angle of dip at the magnetic equator?
What is the approximate value of the Earth’s magnetic field at the surface?
A geophysicist measures the horizontal component (B_H) of the Earth's magnetic field at a location to be 0.18 G and the vertical component (B_V) to be 0.24 G. Calculate the angle of dip at this location.
Describe how paleomagnetism provides evidence for the movement of tectonic plates and the history of Earth's magnetic field reversals.
Explain how the concept of magnetic inclination (angle of dip) can be used to determine the latitude of a place on Earth. Provide the mathematical relationship involved.
Explain why the Earth's magnetic field is not perfectly aligned with its rotational axis, and discuss the implications of this misalignment for navigation and mapping.
The Earth's magnetic field at a certain location is given by a horizontal component of 0.20 G and a total intensity of 0.30 G. Calculate the angle of dip at this location, and state whether the location is closer to the magnetic equator or the magnetic pole.