Electrical & Electronics Measurements Objective Questions – Set 2

Resolution of an instruments is

A 0 - 100 V voltmeter has a guaranteed accuracy of 2 % of full scale reading. The voltage measured by the voltmeter is 75 V. The limiting error is in percentage

In AC circuits, the connection of measuring instruments cause loading effect errors which may effect

The dynometer principle can be for

A null type instrument as compared to a deflected type instrument has

Comparison methods are used

In two wattmeter method of power measurement if the total power is measured by one wattmeter only then power factor of the system is

The resistance in the circuit of the moving coil of a dynamometer wattmeter should be

Relative error is same as

The smallest change in measured variable to which instrument will respond is

Purely mechanical instrument cannot be used for dynamic measurements because they have

The measured value of a resistance is 10.25 ohm, whereas its value of 10.22 ohm. What is absolute error of the measurement?

The terminals across the source are ______________________________ if a current source is to be neglected.

The use of __________________ instruments is merely confined within laboratories as standardizing instrument.

Systematic errors are

The moving coil-meters, damping is provided by

Donors to a semiconductor material is

The errors mainly caused by human mistakes are

Example of donor atom is

An analog ammeter is

Deflection method direct measurements are most widely used as. These are

Resolution of an instruments is

Base-10 system is also called as

The scale of hot wire ammeter is

If two meters X and Y require 40 mA and 50 mA respectively, to give full scale deflection, then

A lissajous pattern, as in figure is observed on the screen of a CRO when voltage of frequencies f_x and f_y are applied to the X and Y plates respectively. Then f_x:f_y is then equal to

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?

In measurement system, the function of the signal manipulating elements is to

A pressure measurement instrument is calibrated between 10 bar and 260 bar. The scale span of the instrument is

Which following are integrating instruments?