this k is proportion proportionality constant and then this k will be equal to k will be equal to q by theta q by theta equal to this C by n A B T by 2 pi. this is nothing, but call it is called the charges occur q by theta means d q it is a equivalent to d q by d theta.
K=q/θ ते वरीलप्रमाणे लिहिता येईल.