Measurement and Instrumentation When using ohmmeter, applied voltage is to be disconnected from the circuit because Voltage source will increase resistance None of these The ohmmeter has its own internal battery Current will decrease resistance Voltage source will increase resistance None of these The ohmmeter has its own internal battery Current will decrease resistance 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 ideally zero. small. very high. high. ideally zero. small. very high. high. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The given figure shows wein bridge connection for frequency measurement. C and R are variables and gang together. For balanced condition the expression for frequency is f = 1/2πCR when R1 = 3R2. R1 = R2/2. R1 = 2R2. R1 = R2. R1 = 3R2. R1 = R2/2. R1 = 2R2. R1 = R2. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation ______ instruments are most sensitive. Hot wire Permanent magnet moving coil Moving iron Dynamometer Hot wire Permanent magnet moving coil Moving iron Dynamometer ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The meter constant of an energy meter is 1500 rev/kWh, the disc makes 3000 revolution in a given time. The energy consumed is 2 kWh 1 kWh 4 kWh 3 kWh 2 kWh 1 kWh 4 kWh 3 kWh ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation For measuring an AC voltage by an AC potentiometer it is desirable that the supply for the potentiometer is taken from The same source as the unknown voltage. Any of above. A source other than the source of unknown voltage. A battery. The same source as the unknown voltage. Any of above. A source other than the source of unknown voltage. A battery. ANSWER DOWNLOAD EXAMIANS APP
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