TS EAMCET 4 May 2018 Shift 1 Solved Paper

A non-conducting thin disc of radius R rotates about its axis with an angular velocity ω. The surface chaise density on the disc varies with the distance r from the center as σ (r) = σ0[1+(

r

R

)β] , where σ0 and β pare constants. If the magnetic induction at the center is B = (

9

10

) µ0σ0 ωR , the value of β is :