I have seen the procedure to jump start a car when the battery is dead.
What I don't understand is that why is one end of the cable connected to the metal frame chassis of the car which has the dead battery?
Why don't we connect the positive negative of the working battery to the positive and negative of the dead battery and start the car?
Can someone explain why do we do this connection and what's wrong in shorting the both battery terminals? How does the battery get charged during the correct procedure?