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A cell is connected between the points A...

A cell is connected between the points A and C of a circular conductor ABCD of centre `O*/_AOC=60^@`. If `B_1` and `B_2` are the magnitudes of the magnetic fields at O due to the currents in ABC and ADC respectively, the ratio `B_1//B_2` is

A

`1//5`

B

6

C

1

D

5

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