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

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} $

1 Answer

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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