Magnetic Effects of Current / करंट का चुंबकीय प्रभाव
JEE Main & Advanced
Physics
Magnetic Effects of Current / करंट का चुंबकीय प्रभाव
Question Bank
Numerical Value Type Questions - Moving Charges and Magnetism
question_answer
A thin ring of 10 cm radius carries a uniformly distributed charge. The ring rotates at a constant angular speed of \[40\pi \,\,red\,\,{{s}^{-1}}\] about its axis, perpendicular to its plane. If the magnetic field at its centre is \[3.8\times {{10}^{-9}}T,\] then the charge (in coulomb) carried by the ring is close to \[({{\mu }_{0}}=4\pi \times {{10}^{-7}}\,N/{{A}^{2}})\].