A 100 turn closely wound circular coil of radius 10 cm carries a current of 3.2 ampere…
Physics · JEE Advanced · NTA Exams — Magnetic Effects of Current and Magnetism
A 100 turn closely wound circular coil of radius 10 cm carries a current of 3.2 ampere .The moment of inertia of the coil is 0.1 kgm2.The coil is placed in a vertical plane and is free to rotate about horizontal axis which coincides with its diameter. A uniform magnetic field of 2.0 T in horizontal direction exists such that plane of the coil is parallel to field .The coil rotates through an angle of 90o due to torque. What is the angular speed acquired by the coil when it has rotated by 90o.
- 12 rad/s
- 15 rad/s
- 20 rad/s
- 25 rad/s
Answer
(C) 20 rad/s
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