You will find that most of the standard 1 lbs lobster takes about 5-7 minutes to boil but it really does depend on the size of the lobster. It will be extremely important to make sure that your lobster is alive when you are cooking it because of the fact that it tends to degrade very quickly after it dies, rendering it inedible because of the bacteria that can form.
In order to avoid getting food poisoning from your lobster, you will want to make sure that it is cooked alive. It is also important to cook it thoroughly so you can get the most out of it. Lobster is generally fairly expensive so you will need to make a point of cooking it to perfection so you will really be able to enjoy it.