Electrical & Electronics Measurements Objective Questions – Set 5

Which of the following meter is most suitable for measuring radio frequency currents?

The effect of stay megnetic fields on the actuating torque of a portable instrument is maximum when the operating field of the instrument and stay fields are

An average reading digital multimeter reads 10 V when fed a triangular wave, symmetric about the axis. For the same input, an rms reading meter will read

The main advantage of Anderson bridge over Maxwell bridge is that

A thermometer having first order dynamics is subjected to a sudden temperature change of 30°c to 150°c. If it has he time constant of 5 sec, what temperature will be indicated by after 5 sec?

Kelvines double bridge is used to measure low resistance because

The errors introduced by an instrument fall in which category ?

Two meters X and Y require 40 mA and 50 mA, Respectively, to give full-scale Deflection, then

The internal resistance of a saturated Western Cell is of order of a

A 8085 microprocessor consist of

The difference between the measured value and the true value is called

To the y input of a CRO a signal defined by 10sin100t is applied. To the x input the signal 10cos100t is fed. The gain for both x-channel and y-channel is the same. The screen shows

A moving coil of a meter has 100 turns, and a length and depth of 10 mm and 20 mm respectively. It is positioned in a uniform radial flux density of 200 mT. The coil carries a current of 50 mA. The torque on the coil is

A voltmeter has 100 scale divisions and can measure up to 100 V. Each division can be read to ½ division. The resolution of the voltmeter is

The resistance of a circuit is found by measuring current flowing and the power fed into the circuit. If the limiting errors in the measurement of power and current are ± 1.5% and ± 1.0% respectively, the limiting error in the measurement of resistance

The measurement of a quantity

Schering bridge is used to measure which of the following?

An ammeter of range 0-25 A has a guaranteed accuracy of 1% of full-scale reading. The current measured by the ammeter is 5 A. The limiting error in the reading is

The internal resistance of Weston standard cell is of order of

The resistance of a circuit is measured from the relation R= P/I², where P is the power fed into the circuit and I is the current flowing through it. If the limiting errors in the measurement of power and current are respectively ± 1.0% and ± 1.0%, then what will be the limiting error in measurement of resistance ?

Attraction and repulsion type instruments are the two different types of which instrument ?

A resistance of 105 ohms is specified using significant figures as indicated below : 1. 105 ohms 2. 105.0 ohms 3. 0.000105 mega ohms Among these,

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

In a wheatstone bridge, a change of 6 Ω in the unknown arm of bridge is required to produce a change in deflection of 2.4 mm of the galvanometer. The sensitivity is

The maximum percentage error in the sum of two voltage measurements when V₁ = 100V ± 1% and V₂ = 80V ± 5% is

Assertion (A) : Precision is a necessary prerequisite of accuracy. Reason (R) : Precision guarantees accuracy.

A 150 V moving iron voltmeter of accuracy class 1-0 reads 75 V when used in a circuit under standard condition. The maximum possible percentage error in the reading is

Following is a 16-bit register for 8085 microprocessor

Which of the following quantities consists of S.I. unit as Hertz?

An electrodynamic meter can be used to measure