Question: Solve all the problems 3.A Wattmeter has a current coil of 0.03 ohms resistance and pressure coil which has series resistance of 225 ohms in

Solve all the problems

3.A Wattmeter has a current coil of 0.03 ohms resistance and pressure coil which has series resistance of 225 ohms in inductor as well as 375 ohms in Pure resistor coil. Given Load current of 20A and supply voltage 240V while the angle between current and Voltage is 80 degrees, Calculate the percentage error and Value of current at a given equal error if the wattmeter is so connected that a) the current coil is on Power supply side. b) the current coil is on Load side. 4.PMMC instrument has a cylindrical coil of radius 5cm and length 100cmm, The Flux Density in the air gap is 0.00015Wb/cm square, If the coil has 50 turns, carrying a current of 0.005 Amperes then Calculate Deflecting Torque Also Calculate the deflection if Spring constant is 0.2 NM/degree

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