A non-conducting ring with radius of 10 cm is uniformly charged with total positive…
Physics · JEE Advanced · NTA Exams — Magnetic Effects of Current and Magnetism
A non-conducting ring with radius of 10 cm is uniformly charged with total positive charge of 10 µC. The ring rotates at constant angular speed of 20 rad/s about an axis passing through its centre perpendicular to plane of the ring. What is magnitude of the magnetic field on the axis of the ring at 5 cm from the centre?
- 143 pT
- 12 pT
- 9 pT
- 2 pT
Answer
(A) 143 pT
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