A spark, a ruined battery and possible an exploding battery.
A dead short occurs which can result in the battery exploding A completion in the external circuit of the battery
it`s best that he wouldn't do this but if he does the battery will melt or explode or the wrench will melt the car can even burst in to flames.
Current
Please share your answer?
sure whatever?
The easiest way to reset a service lamp on any vehicle is to disconnect both battery terminals first. Run a wire across both battery terminals and leave attached for at least a couple of hours. Detach the wire and reconnect the battery terminals. Your service light should now be out. Make sure that you do not run the wire across the positive and negative terminals of the battery. Make sure you disconnect both terminals and run the wire across the cables and not the actual battery terminals. If your service engine light is on it means your computer is registering a code. Make sure you take your car to have it diagnosed properly instead of resetting the light. It may be a serious code that could cause problems in the future.
Better taking care not to have any direct contact between them which means a short circuit. This would spoil the battery immediately
That will depend on the internal resistance of the battery. I = E / R Where I is the current, E is the open circuit battery voltage, and R is the internal resistance of the battery.
there will be little or no change
This isn't going to work because the copper wire is gonna either melt or short the battery out by connecting the terminals together. This is basically how arc welding is done.
no ? that shouldn't be the problem im a mechanic never came across a problem like that
More than likely your new alternator is a dud - check for 14.2v across the battery terminals when the engine is running. Also go over all of the wiring connections for tightness, including the battery terminals and the main earth connection to the bodyshell/ engine.