A uniform wire is bent in the form of a circle of radius `R`. A current `I` enters at `A` and leaves at `C` as shown in the figu

A uniform wire is bent in the form of a circle of radius `R`. A current `I` enters at `A` and leaves at `C` as shown in the figure :
If the length `ABC` is half of the length `ADC`, the magnetic field at the centre `O` will be

A. Zero
B. `(mu_(0)I)/(2R)`
C. `(mu_(0)I)/(4R)`
D. `(mu_(0)I)/(6R)`

A uniform wire is bent in the form of a circle of radius `R`. A current `I` enters at `A` and leaves at `C` as shown in the figure : If the length `AB

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