Electrical & Electronics Measurements Objective Questions – Set 2

Systematic errors are

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

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

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

Resolution of an instruments is

An analog ammeter is

Example of donor atom is

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

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

Donors to a semiconductor material is

Base-10 system is also called as

Which following are integrating instruments?

The dynometer principle can be for

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

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

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

Relative error is same as

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

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

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

Comparison methods are used

The errors mainly caused by human mistakes are

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?

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

The scale of hot wire ammeter is

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

Resolution of an instruments is

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

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 moving coil-meters, damping is provided by