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The earth's magnetic induction at a certain point is 7 × 10' 5 Wbm'2. This is to be annulled by the magnetic induction at the centre of a circular conducting loop of radius 5 cm. The required current in the loop is

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The earth's magnetic induction at a certain point is 7 × 10' 5 Wbm'2. This is to be annulled by the magnetic induction at the centre of a circular conducting loop of radius 5 cm. The required current in the loop is






 
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