Question

7. The diameter of a wire is measured with a screw gauge having 50 divisions on a circular
scale and by one complete rotation of circular scale, the main scale moves 0.5mm. If the
reading of the screw gauge is 0.250 cm. The minimum percentage error in the reading will
be
(a) 5
(b) 0.4
(c) 4
(d) 0.8
112​

Answer 1

Answer:

I think it would be b)

hope it will help u