The smallest division on main scale of a vernier calipers is $1 \mathrm{mm}$. Least count of vernier calipers is $0.06 \mathrm{mm}$. While measuring the length of a line, the zero mark of the vernier scale lies between $9.3 \mathrm{cm}$ and $9.4 \mathrm{cm}$ and $5^{\mathrm{th}}$ vernier scale coincide with a main scale division. The length of the wire (in $\mathrm{cm}$) is

The figure shows a situation when jaws of vernier are touching each other one main scale division is of $1 \mathrm{mm}$. The zero correction in reading measured will be

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

Graph of position of image $\left(v\right)$ versus position of point object $\left(u\right)$ from a convex lens is shown. The focal length of the lens in $\left(\mathrm{cm}\right)$ is (Least count of scale is $0.1 \mathrm{cm}$)