Measurement and Instrumentation The problem of Electrostatic coupling in a transformer is acute at Power frequencies High frequencies High load on the transformer Low frequencies Power frequencies High frequencies High load on the transformer Low frequencies ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A moving coil of a meter has 100 turns, and a length and depth of 10 mm and 20 mm respectively. It is postioned in a uniform radial flux density of 200 mT. The coil carries a current of 50 mA. The torque on the coil is 1 Nm. 100 Nm. 2 Nm. 200 Nm. 1 Nm. 100 Nm. 2 Nm. 200 Nm. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation In DC potentiometer measurments, a second reading is often taken after reversing the polarities of the DC supply and the unknown voltage and the average of the two reading is taken. This is with a view of eliminate the effects of Ripples of the DC supply. Errorneous standardisation. Stray magnetic fields. Stray thermal emfs. Ripples of the DC supply. Errorneous standardisation. Stray magnetic fields. Stray thermal emfs. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The multiplier and the meter coil in a voltmeter are in Parallel Series Series-parallel None of the listed here Parallel Series Series-parallel None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A power factor meter has One current circuit and one pressure circuit None of the listed here Two current circuit and one pressure circuit One current circuit and two pressure circuits One current circuit and one pressure circuit None of the listed here Two current circuit and one pressure circuit One current circuit and two pressure circuits ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation For the AC bridge circuit shown in figure at balance the value of Rd will be (Rc/Ra).Rb. (Rc/Rb).Ra. (Ra/Rc).Rb. (Rb/Rc).Ra. (Rc/Ra).Rb. (Rc/Rb).Ra. (Ra/Rc).Rb. (Rb/Rc).Ra. ANSWER DOWNLOAD EXAMIANS APP
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