no, door locks have nothing to do with check engine light.
Yes.Yes.
The belt breaking would have no effect on the sensors, but it may have bent the valves. That would cause a no start.The belt breaking would have no effect on the sensors, but it may have bent the valves. That would cause a no start.
No but, tire size does effect wheel speed sensors.
If you mean a "hall effect" sensor, there could be a couple different types on your vehicle. Camshaft sensors and crankshaft sensors along with abs wheel speed and transmission speed sensors could be hall effect type sensors. You need to ask for the sensor by application.
These devices are not transformers, but toroid hall effect sensors. That is how they can sense DC.
Removing the sensors will have an effect, and the engine will run poorly or not at all. If you staight pipe after the cat converter and leave the sensors, you will probably be ok. There are o2 sensor simulators available aftermarket, though I dont have experience with them. Removing the cat may cause problems with emmissions inspections as well. If you do remove the sensors, and it runs ok, you will probably lose gas mileage and power, because the computer will get confused.
There are potentiometers, resistors, hall effect switches, piezoelectric,
In comparing the effect of focal lengths in digital cameras with different sized sensors.
No
Many devices can measure magnetic flux: Hall effect sensors, fluxgates, magnetoresistive devices, etc.
It is in the digital cameras, image sensors, and night vision devices that are widely used in the present world.
They monitor the amount of unburned fuel in the exhaust and help the computer adjust the fuel air ratio accordingly.