Healthy Fats. A classic peanut butter and jelly sandwich has 18 grams of fat. This could be a good chunk of your total daily fat, depending on how many calories you consume. The American Heart Association recommends limiting fat to less than 25 to 35 percent of your total calories.
A rheostat is an electrical device that is used to vary voltage across a network to which it is connected. Since resistance is actually responsible for voltage drop, so by varying the resistance, it is possible to obtain different values of voltage.
The simplest example of a temperature controller is a common thermostat found in homes. For instance, a hot water heater uses a thermostat to control the temperature of the water and maintain it at a certain commanded temperature. Temperature controllers are also used in ovens. When a temperature is set for an oven, a controller monitors the actual temperature inside of the oven.