A positive connection is one in which a change (increase or decrease) in some variable results in the same type of change (increase or decrease)in a second variable. The positive connection in the figure below for a cooling coffee cup implies that the hotter the coffee is the faster it cools.
The power consumption of small devices is usually measured in Watts, and the power consumption of larger devices is measured in kilowatts (kW), or 1,000 Watts. Electricity generation capacity is often measured in multiples of kilowatts, such as megawatts (MW) and gigawatts (GW).
Appliance Watts/Amps Calculator Electricity is measured in units of energy called watts, named after James Watt, the inventor of the steam engine. Watts is generally defined as the amount of power (or energy) an appliance uses (consumes) when operated at its maximum capacity for 1 hour.Amps on the other hand is defined as how much energy an appliance draws, or the rate of energy that flows through wire when an appliance is used for 1 hour.ou can determine power characteristics of an appliance if watts rating is not provided, by the following equation: V (Volts) X A (Amps) = Watts (Ohm's Law) A=W/V V=W/A To determine Amps consumed by a 25watt 12V light bulb, for example, use the equation A=W/V or (25/12=2.1Amps).