The magnetic moment of the assumed dipole at the earth's centre is 8.0 × 1022 A m2. Calculate the magnetic field B at the geomagnetic poles of the earth. Radius of the earth is 6400 km.
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Explanation:
To find: The minimum value of v so that the vertically-upward component of velocity is non-positive for each photoelectron.
Step 1:
Given data in the question
Magnetic dipolar moment at the center of the Earth,
Earth Radius, d = 6400 km
At the end of the Earth's position (axial) is the geomagnetic pole.
The magnetic field at the dipole's axial level
Step 2:
We know that
B = 61 μT
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