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Questions  >>  CBSE XII  >>  Physics  >>  Magnetism and matter
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Q)

The charged currents in the outer conducting regions of the earth core are thought to be responsible for earth's magnetism. What might be the battery (ie the cource of energy ) to sustain these currents ?

$\begin{array}{1 1} \text{electro magnetic radiation} \\ \text{radio active material} \\ \text{molter form of iron deposits} \\ \text{ All the above} \end{array} $

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A)
Solution :
The source of energy to sustain these current should be the radio active material in the interior of the earth .
Answer : $ \text{radio active material}$
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