If it is not given you have to if not given that means you have to assume unity even it is not mention in the question, you have to assume that it is unity; that means, I am writing assume the δ=1 and m0=1 that is for smooth conductor.
जर δ किंवा m दिला नसेल तर तो 1 आहे असे समजावे. म्हणून मी इथे δ=1 आणि m0=1 असे लिहीत आहे.