Screw Gauge

In a screw gauge, there are $100$ divisions in circular scale and each main scale division is of $1 \mathrm{mm}$. With no gap between the jaws, ${98}^{\mathrm{th}}$ divisions coincides with the main scale and zero of main scale is not visible. While measuring the diameter of a ball, the circular scale is between $3 \mathrm{mm}$ mark and $4 \mathrm{mm}$ mark. ${76}^{\mathrm{th}}$ division of circular scale coincides with the reference line. Select the correct alternative

$10$rotations of the cap of a screw gauge is equivalent to $5 \mathrm{mm}$. The cap has $100$ divisions. A reading taken for the diameter of wire with the screw gauge show $4$ complete rotations and $35$divisions on the circular scale. The diameter of the wire, is $n \times {10}^{-4} \mathrm{m}$. Value of $n$, is

Screw gauge is said to have a negative error

A wire has mass $(0.4\pm 0.004) \mathrm{g}$, radius $(0.6\pm 0.006) \mathrm{cm}$and length $(8\pm 0.08) \mathrm{cm}$. The maximum percentage error in the measurement of its density is

The reading of micrometer screw gauge shown in figure (Least count is $0.01 \mathrm{mm})$

A screw gauge has main scale divisions of $1 \mathrm{mm}$ each and its circular scale has $100$ divisions while measuring a diameter of a wire, cap end is after ${21}^{\mathrm{st}}$ marking of main scale and ${52}^{\mathrm{nd}}$ division of circular scale coincides with the reference line, what is the measured diameter of the wire

The distance moved by the screw of a screw gauge is $2 \mathrm{mm}$ in four rotations and there are $50$ divisions on its cap. When nothing is put between its jaws, ${20}^{\mathrm{th}}$ division of circular scale coincides with reference line, and zero of linear scale is hidden from circular scale when two jaws touch each other or zero of circular scale is lying above the reference line. When plate is placed between the jaws, main scale reads $2$ divisions and circular scale reads $20$ divisions. Thickness of plate is

Least count of screw gauge is defined as