In the figure shown ABC is a circle of radius a. Arc AB and AC each have resistance R. Arc BC has resistance 2R. A current I enters at point A and leaves the circle at B and C. All straight wires are radial. Calculate the magnetic field at the centre of the circle. Each arc AB, BC and AC subtends 120^(@) at the centre of the circle.

In the figure shown ABC is a circle of radius a. Arc AB and AC each ha

1.	In the figure shown ABC is a circle of radius a. Arc AB and AC each have resistance R. Arc BC has resistance 2R. A current I enters at point A and leaves the circle at B and C. All straight wires are radial. Calculate the magnetic field at the centre of the circle. Each arc AB, BC and AC subtends 120^(@) at the centre of the circle.
Answer» ANSWER :`B=0`

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