Measurement and Instrumentation Which of the following instruments can be used to measure AC current only? Induction type ammeter Moving iron voltmeter Moving iron ammeter Permanent Magnet Type ammeter Induction type ammeter Moving iron voltmeter Moving iron ammeter Permanent Magnet Type ammeter ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation When a potentiometer is used for measurement of voltage of an unknown source, the power consumed in the circuit of the unknown source under null condition is small. high. very high. ideally zero. small. high. very high. ideally zero. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation 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 Active power in R phase Active power of Y phase Reactive power of R phase Power proportional to 3 phase power if the load is balanced Active power in R phase Active power of Y phase Reactive power of R phase Power proportional to 3 phase power if the load is balanced ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The main advantage of Anderson bridge over Maxwell bridge is that balance equation independent of frequency. attaining balance condition is easier. measures high Q inductors. reduction of the cost. balance equation independent of frequency. attaining balance condition is easier. measures high Q inductors. reduction of the cost. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A moving iron ammeter may be compensated for frequency errors by Series resistance A series inductance A shunt resistance Shunt capacitance Series resistance A series inductance A shunt resistance Shunt capacitance ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Resistances can be measured with the help of Ohmmeters and resistance bridges Ammeters Voltmeters Wattmeters Ohmmeters and resistance bridges Ammeters Voltmeters Wattmeters ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS