The physical quantity which is not a unit of energy is:

Find the thickness of the cubical object using the defective vernier caliper. The main scale has $\mathrm{mm}$ marks and $10$ divisions of vernier scale coincide with $9$ divisions of main scale.

The number of circular divisions on the shown screw gauge is $50$. It moves $0.5 \mathrm{mm}$ on the main scale for one complete rotation. The main scale reading is $2$. The diameter of the ball is,

A screw gauge gives the following reading when used to measure the diameter of a wire.

• Main scale reading: $0 \mathrm{mm}$
• Circular scale reading: $52 \mathrm{division}$

Given that $1 \mathrm{mm}$ on the main scale corresponds to $100$ divisions on the circular scale. The diameter of the wire from the above data is,