What is the function of current coil and pressure coil in wattmeter use in electric circuit?
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The Wattmeter is an electrodynamic instrument used for measuring the electric power (rate of supply of electric energy) of any given electric circuit. The electric power is measured in Watts.
Wattmeter usually consists of two coils known as Current coil and Potential coil. The Current coil is connected in series with the electric circuit whereas the movable Potential coil is connected in parallel. The current flows through the Current coil generating an electromagnetic field around the coil. A needle connected to the potential coil indicates measurement of the electric power.
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