Because the temperatures are high in pressure cooker
A pressure cooker will cook food faster and also tenderize tougher meats.
because external pressure is low on the montains and food dont cook easily that is why mountainers carry with them pressure cooker........
pressure cookers cook faster. Instead of cooking something for 3-4 hours you can cut that down to maybe 1 hour. It tenderizes meat by forcing the steam into the food and breaking up some of the molecules
A pressure cooker uses steam from water to cook food and is usually found in a residential setting. A pressure fryer uses oil to cook the food. Pressure fryers are only found in restaurants and are generally used to fry chicken.
On the food
Because the boiling point of water increases as the pressure increases, the pressure built up inside the cooker allows the liquid in the pot to rise to a higher temperature before boiling thus cooking the food faster than usual.
You can cook just about any kind of food in any sort of cookware as long as you have the experience. You can google for a lot of results on what is best cooked in a pressure cooker.
The higher pressure raises the boiling point of water.
During heating the pressure increase in the pressure cooker; as a consequence the temperature increase, the cooking is faster, part of energy saved, etc.
cooking food faster than conventional cooking
it is a closed system, pressure builds from heat causing trapped steam, thus food cooks faster.
because in presser cooker presser in heigh so temp. in side cooker is heigh and presser is directly praposnal to temperature