There are magnetic screwdrivers that help the operator to keep the screw on the driver when there is no pressure on the screw. However, I wonder, does the magnetic field assist the operator in turning the screw?
Edit: I understand that the main feature of a magnetized screw driver is to help the operator keep the screw in place once placed on the tip of the screwdriver. What I want to know is, is there any amount of force, however minuscule, from the magnetic field, that also turns the screw, however small an amount, from the magnetic field of the magnetized screw driver?
I've used both magnetized and unmagnetized screwdrivers, and I can't say that, from the feedback I've gotten from my hands, I intuited the answer. Also, I didn't control for the size of the screwdriver, the geometry of the screw, the resistance of the material, the vigor of my hands, etc. etc. From my layman's knowledge of physics, I would guess that a magnetized screwdriver would effect a very small force on the screw, but not one strong enough that it could be felt physiologically .