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Astronomy
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Planetary Magnetic Dynamos
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Astronomy
AST.147 Planetary Magnetic Dynamos
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A field that is produced when the solar wind interacts with a planet's ionosphere is best described as
A
a guaranteed sign of a molten iron core dynamo
B
an induced field rather than direct evidence of an active internal dynamo
C
a fossil field locked into ancient rocks
D
a field made by impact craters rotating
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