Earth’s Magnetic Field
Physics ⇒ Earth and Space Physics
Earth’s Magnetic Field starts at 8 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Earth’s Magnetic Field.
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See sample questions for grade 12
A location has a magnetic declination of 10° east. If a compass points to magnetic north, what is the true geographic direction relative to the compass needle?
Describe how paleomagnetism provides evidence for plate tectonics.
Describe the effect of solar storms on Earth's magnetic field.
Describe the role of the magnetosphere in protecting life on Earth.
Explain the dynamo theory as it relates to the generation of Earth's magnetic field.
Explain why compasses do not work properly near the magnetic poles.
Explain why the Earth's magnetic field is not exactly that of a perfect dipole.
Explain why the Earth's magnetic field is often approximated as a dipole field.
If the horizontal component of Earth's magnetic field at a location is 20 μT and the angle of dip is 60°, calculate the vertical component of the magnetic field at that location.
If the total intensity of Earth's magnetic field at a place is 50 μT and the angle of dip is 30°, calculate the horizontal component of the field.
State the relationship between the total intensity (B), the horizontal component (Bh), and the angle of dip (θ) of Earth's magnetic field.
State the SI unit of magnetic field strength.
The horizontal component of Earth's magnetic field at a place is zero. What is the value of the angle of dip at that place?
