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TS EAMCET Medical 2015 Paper with Answer key

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Question : 119

Total: 160

Two concentric coils, of 10 turns each, are placed in the same plane. Their radii are 20 cm and 40 cm and carry 0.2 amp and 0.3 amp current respectively in opposite directions. The magnetic induction (in Tesla) at their centre is

5
4
µ0
3
4
µ0
9
4
µ0
7
4
µ0

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