Measurement and Instrumentation Resistances can be measured with the help of Ammeters Ohmmeters and resistance bridges Wattmeters Voltmeters Ammeters Ohmmeters and resistance bridges Wattmeters Voltmeters ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation How many fundamental units are there ? 4 8 7 6 4 8 7 6 ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation In a ballistic galvanometer, the deflecting torque is proportional to Sine of measured Square of current through coil The current through coil Square-root of current through coil Sine of measured Square of current through coil The current through coil Square-root of current through coil ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The current ‘I’ through a resistance R is measures with the following uncertainties I = 4 A ± 0.5%, R = 100Ω±0.2%. If power is computed from these two measured quantities, the uncertainty in the power computed will be 1% 1.2% 0.5% 1.5% 1% 1.2% 0.5% 1.5% ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The maximum percentage error in the sum of two voltage measurements when V1 = 100V ± 1% and V2 = 80V ± 5% is ± 6% ± 3% ± 4% ± 2.8% ± 6% ± 3% ± 4% ± 2.8% 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 Reactive power of R phase Active power of Y phase Power proportional to 3 phase power if the load is balanced Active power in R phase Reactive power of R phase Active power of Y phase Power proportional to 3 phase power if the load is balanced ANSWER DOWNLOAD EXAMIANS APP
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