A 0 - 200 V voltmeter has a guaranteed accuracy of 1% of full scale reading. The voltage measured by this instrument is 50 V. What is the limiting error? 2% 3% 5% 4% TRUE ANSWER : ? YOUR ANSWER : ?
A rectifier type instrument is connected to 100VDC and is operated in the DC measuring module reads 90V 111V 50V 100V TRUE ANSWER : ? YOUR ANSWER : ?
The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100°hm. If this meter is to have full deflection at 5A, what is the value of the shunt resistance to be used? 1/49.99 ohms 49.99 Ohms 2 Ohms 1 Ohm TRUE ANSWER : ? YOUR ANSWER : ?
To measure high frequency currents, we mostly use ______ ammeter. Dynamometer Moving iron Thermocouple Hot wire TRUE ANSWER : ? YOUR ANSWER : ?
The three resistors R1, R2 and R3 have the following ratings: R1 = 25Ω ± 4%, R2 = 65 Ω ± 4%; R3 =45 Ω ± 4%. If the resistance are connected in series, then limiting error produced in equivalent resistance is 4% 3% 2% 1% TRUE ANSWER : ? YOUR ANSWER : ?
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 Minimize the effect of stray magnetic fields. Obtaine large deflecting torque. Minimize the effect of temperature variation. Reduce the size of the meter. TRUE ANSWER : ? YOUR ANSWER : ?
An induction wattmeter can be used for Dc only Both DC and AC Any of the listed here Ac only TRUE ANSWER : ? YOUR ANSWER : ?
A set of independent current measurements taken by four observers was recorded as : 117.02 mA, 117.11 mA, 117.08 mA and 117.03 mA. What is the range of error ? ± 0.054 ± 0.065 ± 0.045 ± 0.056 TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following meters has a linear scale? Moving iron meter Hot wore meter Moving coil meter Thermocouple meter TRUE ANSWER : ? YOUR ANSWER : ?
A wattmeter reads 30.34 W. The absolute error in the measurement is - 2.22 W. What is the true value of power? None of these 32.56 W . 25.45 W. 28.12 W. TRUE ANSWER : ? YOUR ANSWER : ?