The power adapter need 230v, 50Hz supply
Wattage, voltage, and connector.
First, one would need to know the exact model of the laptop. Many different places sell laptop power adapters such as Best Buy, Office Depot and even places like Walmart and Target.
No. The offer no protection. If you need protection, you must use a surge protector and even that is no guarrantee it will not damage the battery or the computer.
Every laptop has a different power rating.
DELL AC Adapters are manufactured with ID chips. The Laptop communicates with the AC adapter to find out the type and power rating. When the AC power adapter doesn't answer it doesn't charge the laptop battery. See the related link below for a full explanation of the problem.
You will need a 110 volt to 220 power converter for overseas travel
No. Some computer speakers require AC adapters, while others can run simply on battery power or USB.
You have to carry your chargers if you are travelling for long time. The electrical sockets in Canada and USA are identical hence you will not need travel adapters. The domastic electricity also has same voltage in USA and Canada.
For Israel, you will need a power adapter that is compatible with Type C or Type H outlets. These adapters are commonly used in Israel for electronic devices.
You need no adapters.
It would need to be reasonably powerful to develop and test games on and dual graphics adapters would probably be needed. You would definitely consider a desktop computer for this job though, not a laptop
yes, an external monitor will still need to be plugged in separately