What shall be the effect on the least count of spherometer if number of divisions on its circular scale be doubled?

The effect in the spherometer if the number of divisions on its circular scale is doubled is that if its circular division has been increased or doubled, the accuracy of the spherometer will also increase. While the L.C in the spherometer will decrease if both of the factor or parts has been doubled or increased.

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

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