AP EAPCET 19-Aug-2021 Shift 1 Paper

Given, radius of hollow cylinder =R
Current =i
Distance from axis =T
Let magnetic field be B.
∵ No current is passing through region r<R
and magnetic field (B)=

1

2π

µ0I

r

So,B(r<R)=0
B(r=R)=

1

2π

µ0I

R

and B(r>R)=

1

2π

µ0l

r

So, these variations are correctly shown as below.