Strictly speaking electric motors deliver maximum torque at CLOSE to zero rpms.
torque = power / angular speed
division by zero is undefined.
yes, but check the mathematical limit as speed approaches zero.
Torque and force are related concepts, both of which are valid at speed of zero as well as higher speeds.
Torque wrenches measure torque and are intended to do so primarily when a bolt is not in motion.
If torque did not exist at a speed of zero, toyota priuses would not be able to move uphill from a dead stop, and starter motors would just sit still whenever a person tried to start a car. electric trains (and diesel trains) would be useless.