Solve this. Q28. A spherometer has 250 equal divisions marked along the periphery of its disc; and the full rotation of the disc advances on the main scale by 0.0625 cm. The least count of the system is (a) 2.5 × 10–2 cm (b) 2.5 × 10–3 cm (c) 2.5 × 10–4 cm (d) None of these Share with your friends Share 2 Decoder_2 answered this Dear student,least count=pitch total number of divisions=0.0625250cm=2.5×10-4cmRegards 5 View Full Answer