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A battery is connected between two points A and B on the circumference of a uniform conducting ring of radius r and resistance R. One of the arcs AB of the ring subtends an angle \theta at the centre. Magnetic field due to current at the center of ring is

Option: 1

zero, only if  \theta=180^{\circ}


Option: 2

zero for all values of \theta


Option: 3

proportional to 2\left(180^{\circ}-\theta\right)


Option: 4

inversely proportional to r.


Answers (1)

best_answer

\mathrm{i \theta=\text { const } \text {. }}

Zero field

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