AE-JE Foundation EE : Electrical & Electronic Measurements Revision QUIZ

In an ammeter which is rated at 0-50 A has a guaranteed of accuracy of ±1.2% of full-scale reading. When this ammeter placed in a circuit it measures 30 A of current. What will be the range of measurement of current?

A single-phase energy meter which is designed to make 120 revolution for one unit of energy. What will be the number of revolution when a load connected to the energy meter which carrying a current of 30 A at 220 V supply at a power factor of 0.8 lagging when the meter is running for 2 hour?

A dynamometer type of instrument can measure:

Which damping is used in to produce damping torque in moving iron instrument?

The unit of specific resistance of a substance is:

A zero to 200 A ammeter has a guaranteed accuracy of 1% on full scale reading. The current measured by an ammeter is 60 A . The percentage limiting error is.

In two wattmeter method, which is used to measure power in a three-phase circuit what will be the reading of both the wattmeter individually when the power factor is unity.

For the arrangement shown in figure, the value of unknown resistance is:

In an A.C. bridge which is shown in figure below, if Z₁ = 100 Ω, Z₂ = (200 + j150) Ω & Z₃ = (300 + j120) Ω, then find the unknown impedance Z₄ if the bridge is in balanced condition.

In a certain case of measurement with a number of trial for the precision a set of current measured was recorded as 8.09, 8.12, 8.06, 8.15, 8.11 A. Calculate the range of measurement of current.

Which one of the following instrument is  preferred to use at high frequency range for measurement of current?

The power of a 3-phase system is measured by two-wattmeter method. The reading of both watt meters are 100 W and 200 W respectively.

Then the power factor of system will be.