Kelvin’s double bridge is used to measure low resistance because effect of contact and lead resistance is eliminated. resistance variation due to temperature. it has high sensitivity. there is no thermo electric emf. TRUE ANSWER : ? YOUR ANSWER : ?
Piezoelectric effect is carried out in constant k prototype. crystal filter. composite filter. m derived. TRUE ANSWER : ? YOUR ANSWER : ?
For a circuit given that I = 2 ± 5 % A, R = 100 ± 0.2 % Ω the limiting error in the power dissipation I2 R in the resistor R is 10.2% 25.2% 5.2% 1.2% TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following devices may be used for extending the range of instruments? Shunt Current transformers All of the listed here Potential transformers TRUE ANSWER : ? YOUR ANSWER : ?
A moving coil ammeter has a uniform scale with 50 division and gives a full scale reading 10 A. The instrument can read up to (1/5)th of a scale division with a fair degree of certainty. What is the resolution of the instrument in mA? 25 mA. 80 mA. 50 mA. 40 mA. TRUE ANSWER : ? YOUR ANSWER : ?
To measure ac as well as dc power, we use Induction wattmeter Dynamometer wattmeter Sometimes induction and sometimes dynamometer wattmeter None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
The main advantage of Anderson bridge over Maxwell bridge is that reduction of the cost. attaining balance condition is easier. balance equation independent of frequency. measures high Q inductors. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the quantity consists of SI unit as Candela? Velocity Luminous intensity Impulse Force TRUE ANSWER : ? YOUR ANSWER : ?
The thermocouple instrument will measure None of these Current Flux Voltage TRUE ANSWER : ? YOUR ANSWER : ?
The thermocouple instruments do not have High degree of measuring accuracy Absence of frequency error Independence of ambient temperature High sensitivity TRUE ANSWER : ? YOUR ANSWER : ?