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).
Well, before doing so, let us see what is an electric meter and what does it do. An electric meter or more commonly used term, the electricity meter is meant for measuring the total electrical energy consumed in a house, shop, offices etc and the units of measurements are usually kilowatt-hour (KWh).he electric meter working involves computing the integral over time of the electrical power in Watts consumed on the power network delivered to a particular connection. This electrical power is measured by performing the product of the line current in Amps and the line voltage in Volts.