A battery is connected between two pints A and B on the circumference of a uniform…
Physics · JEE Advanced · NTA Exams — Magnetic Effects of Current and Magnetism
A battery is connected between two pints 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 θ at the centre. The value of the magnetic induction at the centre due to the current in the ring is
- proportional to (180° – θ)
- inversely proportional to r
- zero, only if (θ = 180°)
- zero for all values of θ
Answer
(D) zero for all values of θ
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