If in circular coil of radius `R`, current `I` is flowing and in another coil `B` of radius `2R` a current `2I` is flowing , then the raatio of the magnetic fields `B_(A) and B_(B)`, produced by them will beA. `1`B. `2`C. `1//2`D. `4`

If in circular coil of radius `R`, current `I` is flowing and in anoth

1.	If in circular coil of radius `R`, current `I` is flowing and in another coil `B` of radius `2R` a current `2I` is flowing , then the raatio of the magnetic fields `B_(A) and B_(B)`, produced by them will beA. `1`B. `2`C. `1//2`D. `4`
Answer» Correct Answer - 1 Magnetic field at centre of circular coil `A` is `B_(A) =(mu_(0)Ni)/(2R)` `R` is radius and I is current flowing in coil Similarly `B_(B) =mu_(0N(2i))/(2.(2R))` `=(mu_0Ni)/(2R) = (B_(A))/(B_(B)) =1` .

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If in circular coil of radius `R`, current `I` is flowing and in another coil `B` of radius `2R` a current `2I` is flowing , then the raatio of the magnetic fields `B_(A) and B_(B)`, produced by them will beA. `1`B. `2`C. `1//2`D. `4`

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