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).
The symbol kWh stands for kilowatt-hour, which is a unit of energy amounting to one kWh. KWh is not used in any formal system as standard unit.However, the unit is used to determine the consumption of electricity. It is commonly used in household electrical applications.ith the use of a kilowatt-hour meter, a homeowner can determine the amount of electricity consumed within a month. One kilowatt is equivalent to a thousand watts. A Kilowatt-hour pertains to a certain piece of equipment or set of devices that will consume 1,000 watts in a span of an hour.