ECE :: Measurements and Instrumentation
- In a moving coil instrument, the deflecting torque is proportional to
- In a moving iron meter, the deflecting torque is proportional to
- Which wave has the least form factor?
- The current coil of a wattmeter is connected to the CT of R-phase. The potential coil is connected across Y and B phases. The wattmeter measures
- Two voltmeters have the same range 0-400V. The internal impedance are 30,000 Ohms and 20,000 Ohms. If they are connected in series and 600V be applied across them, the readings are
- The two pressure coils of a single phase power factor meter have
- To measure the flux, devices used are based on
- No eddy current and hysteresis losses occur in
- The absolute measurement of resistance is done by
- For power measurement of three phase circuit by two wattmeter method, when the value of power factor is less than 0.5 lagging
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