Measurement and Instrumentation The problem of Electrostatic coupling in a transformer is acute at High load on the transformer Power frequencies Low frequencies High frequencies High load on the transformer Power frequencies Low frequencies High frequencies ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A Manganin swap resistance is connected in series with a moving coil ammeter consisting of a milli ammeter and a suitable shunt in order to Reduce the size of the meter. Minimize the effect of stray magnetic fields. Minimize the effect of temperature variation. Obtaine large deflecting torque. Reduce the size of the meter. Minimize the effect of stray magnetic fields. Minimize the effect of temperature variation. Obtaine large deflecting torque. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Kelvin’s double bridge is used to measure low resistance because there is no thermo electric emf. effect of contact and lead resistance is eliminated. resistance variation due to temperature. it has high sensitivity. there is no thermo electric emf. effect of contact and lead resistance is eliminated. resistance variation due to temperature. it has high sensitivity. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation In a wheatstone bridge, a change of 6 Ω in the unknown arm of bridge is required to produce a change in deflection of 2.4 mm of the galvanometer. The sensitivity is 5.0 mm/Ω 0.4 mm/Ω 0.8 mm/Ω 2.5 mm/Ω 5.0 mm/Ω 0.4 mm/Ω 0.8 mm/Ω 2.5 mm/Ω ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The smallest change in measured variable to which instrument will respond is precision. resolution. sensitivity. accuracy. precision. resolution. sensitivity. accuracy. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The expected value of the voltage across a resistor is 80 V, and the measured value is 79 V. What is the percentage error and relative accuracy of the measurement ? 1.5% & 99% 1.25% & 98.75% 1.5% & 98.75% 1.25% & 98.25% 1.5% & 99% 1.25% & 98.75% 1.5% & 98.75% 1.25% & 98.25% ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS