What tool would you use to remove nut 10 in figure 1?

To remove nut 10, the correct tool is designed specifically for the type and size of fastener in question. In this case, tool T is likely a wrench or a socket with the appropriate size and fit for the nut. Such tools are ideal for gripping hexagonal or square nuts securely, allowing for effective torque application while minimizing the risk of rounding off the corners of the nut.

Using the right tool ensures that the nut can be removed without damaging the surrounding hardware or the nut itself, which is crucial in electrical work where components must maintain their integrity. Tools that are less suited for the task may slip or not fit correctly, leading to frustration or potential damage. Hence, tool T stands out as the most suitable choice for effectively and safely removing nut 10.