http://en.wikipedia.org/wiki/Electricity_meter
Q-meter works on the principle of Series Resonance
CLAMP METER WORKS WITH THE PRINCIPLE OF HALL EFFECT..
The working principle of an electronic energy meter is a device that measures the electronic energy consumed (usually in KWh). It is often incased in glass and has a disk that rotates that measures the amount of power (product of current and voltage) the flows through the meter. The rotation is then integrated over time either by mechanical dials or an electronic digital counter to determine the total energy used.To simplify reading, many modern ones also contain a type of radio transponder that can be interrogated remotely from the meter reader's vehicle so he/she no longer has to find, read, and write down the value on every meter on his route.
convert mechanical energy to electrical energy
The bio fuel cell work on the principle of converting some chemical energy into electrical energy.
this is good to know that there is a way i can find somthing usuful for mi studies
galvanometer is an elctromechanical instrment which is used to indicate the current or voltage. principle of working-it works on the principle of conservation of electrical energy to mechanical energy.
trivector meters are used to measure kVAh and also kVA of maximum demand.it has a kwh meter and reactive kvah meter in a case with special summator mounted between them.
basic principle of analogue clamp meter
effect of moisture content on solid waste energy determination and principle of bomb calorie meter??
What is the working principle of venturimeter?
It is a radial flow axial turbine . It works on the principle to convert pressure energy into kinetic energy.