Jupiter does not have a large metal core like Earth. How can it have a magnetic field?
a. The magnetic field is left over from when Jupiter accreted.
b. Its magnetic field comes from the Sun.
c. It has metallic hydrogen inside, which circulates and makes a magnetic field.
d. It has a large metal core.
Answer: c. It has metallic hydrogen inside, which circulates and makes a magnetic field.
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A positively charged insulating rod is brought close to an object that is suspended by a string. If the object is repelled away from the rod we can conclude:
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