disc of radius r is made of a material of negligible

Last updated: 6/8/2023

disc of radius r is made of a material of negligible resistance and can rotate about a conducting horizontal shaft A smaller non conducting disc of radius a is fixed onto the same shaft and has a massless cord wrapped around it which is attached to a small object of mass m as shown Two ends of a resistor of resistance R are connected to the perimeter of the disc and to the shaft by sliding contacts The system is then placed into a uniform horizontal magnetic field B and the mass m is released Find the terminal angular velocity with which the disc will rotate finally Take r 10cm a 2cm R A 200 rad s C 100 rad s R 2 B 0 2 T m 50 gm g 10 m s 100 B 300 rad s D 10 rad s m