How does the supply voltage affect the accuracy of  Wheatstone bridge measurements?

1 Answer

Answer :

As the supply voltage increases, bridge components may heat  up and become less accurate.

Related questions

Description :  A Wheatstone bridge cannot be used for precision measurements because errors are introduced into on account of: - a) Resistance of the connecting lead b) Thermoelectric EMFs c) Contact resistance d) all the above

Last Answer :  A Wheatstone bridge cannot be used for precision measurements because errors are introduced into on account of: - a) Resistance of the connecting lead b) Thermoelectric EMFs c) Contact resistance d) all the above

Description : The circuit shown in the illustration represents a/an ____________. EL-0085 A. operational amplifier B. Wheatstone bridge C. magnetic amplifier D. power supply

Last Answer : Answer: D

Description : The illustrated circuit is a wheatstone bridge. If the meter 'G' reads 0 with the switch closed then ________. EL-0024 A. the current through R1 - R2 is equal to the current through R3 - Rx B. the voltage ... of E C. the resistance of Rx is equal to the resistance of R2 D. all the above are true

Last Answer : Answer: A

Description : For dynamic strain measurement, the Wheatstone bridge used is of __________ type. (A) Voltage sensitive null (B) Voltage sensitive deflected (C) Current sensitive deflected (D) None of these

Last Answer : (B) Voltage sensitive deflected

Description : When you are measuring a component using a bridge, what is the most common cause of inaccurate measurements?

Last Answer : The capacitive and inductive characteristics of the test leads.

Description : You are calibrating a multimeter using internal batteries to supply power for resistance measurements. However, you are unable to adjust the pointer to 'zero' using the adjustment knob. Therefore, you should ... change scales to the R X 100 scale and adjust using the 'zero ohms' adjusting knob

Last Answer : Answer: A

Description : Which of the following bridge is frequency sensitive: a) Wheatstone bridge b) Maxwell bridge c) Anderson bridge d) Wien bridge

Last Answer : Ans: C

Description : A capacitor discolored due to excessive heat should be _____________. A. calibrated using a capactance wheatstone bridge B. replaced and the reason for the overheating found C. cooled with a spray ... purpose D. resoldered with care taken to insure that the origional cold solder joint is repaired

Last Answer : Answer: B

Description : The illustrated circuit is a _____________. EL-0024 A. megohm meter B. Gauss meter C. wheatstone bridge D. germanium diode tester

Last Answer : Answer: C

Description : The Wheatstone bridge is a precision measuring instrument utilizing the principle of changes in _____________. A. inductance B. capacitance C. resistance D. amperage

Last Answer : Answer: C

Description : What is the difference the a wheatstone bridge and a potentiometer ?

Last Answer : The difference between a potentiometer and a wheatstone bridge measuring instrument is that potentiometer is a voltage measuring instrument and wheatstone bridge is a current measuring instrument. 

Description : A wheatstone bridge is balanced if ___

Last Answer : the ratio of resistors on one side of the bridge equals the ratio of resistors on the other side

Description : A simplified version of the Wheatstone bridge wherein, two of the ratio arms are replaced by a 100cm long Manganin of uniform cross-sections and provided with a slider

Last Answer : slide-wire bridge

Description : Wheatstone bridge Practical

Last Answer : Practical Significance The conductors are generally made from copper & aluminum. They are having low resistance. It is essential to measure its resistance precisely to calculate the voltage drop per ... the total resistance (R) of the coil. 6. Determine per unit length resistance

Description : Wheatstone bridge

Last Answer : Wheatstone bridge

Description : What two properties of the launch condition may affect multimode fiber attenuation measurements?

Last Answer : . Launch spot size and angular distribution.

Description : When using a multimeter for resistance measurements, it should be calibrated by clipping the loose ends of the leads together and _____________. A. setting the instrument pointer at 'zero' ohms B. ... the plus and minus terminals D. using a special purpose resistance measuring instrument (a bridge)

Last Answer : Answer: A

Last Answer : For measurements on high voltage capacitors, the suitable bridge is Schering bridge.

Description : When making voltage measurements in a high-resistance circuit, you should always use a voltmeter with what relative value of resistance?

Last Answer : . High.

Description : The frequency response of test equipment refers to what aspect of ac voltage measurements?

Last Answer : the range of frequencies that can accurately be measured.

Description : If a linear traverse follows a sharp curve round a large lake where it is difficult to have long legs,  the accuracy of the traverse may be improved by  (A) Taking short legs  (B) Making ... (C) Making a subsidiary traverse to determine the length of a long leg  (D) All the above 

Last Answer : (C) Making a subsidiary traverse to determine the length of a long leg 

Description : Greater accuracy in linear measurements, is obtained by (A) Tacheometry (B) Direct chaining (C) Direct taping (D) All the above

Last Answer : (C) Direct taping

Description : Transit rule of adjusting the consecutive coordinates of a traverse is used where (A) Linear and angular measurements of the traverse are of equal accuracy (B) Angular measurements are more accurate ... (C) Linear measurements are more accurate than angular measurements (D) All of the above

Last Answer : (B) Angular measurements are more accurate than linear measurements

Description : A dc bridge widely used for the accurate measurements of resistance

Last Answer : Wheatstone bridge

Description : When checking a diode with an ohmmeter, what is indicated by two high resistance measurements?

Last Answer : The diode is open or has a high-forward resistance.

Description : Radar surface-angular measurements are referenced to true north and measured in what plane?

Last Answer : Horizontal plane.

Description : What are the three units of measure most commonly used when referring to af power measurements?

Last Answer : DB, dBm, and vu.

Description : Kelvin bridges are well suited for what type of measurements?

Last Answer : Small values of resistances

Description : Power measurements performed with calorimeters are based on what three variables?

Last Answer : Temperature, mass, and time.

Description : For power measurements, what advantage does an electronic wattmeter have over an electrodynamic wattmeter?

Last Answer : Electronic wattmeters are capable of measuring high-fequency signals.

Description : When is an optical power meter measurement recommended for conducting field measurements on installed optical fiber cables or cable plants?

Last Answer : When an installed optical fiber cable or cable plant is less than 50 meters in length.

Description : Why is a dead-zone fiber placed between the test fiber and OTDR when conducting attenuation measurements?

Last Answer : To reduce the effect of the initial reflection at the OTDR

Description : Why do end users perform fiber geometry measurements in the laboratory?

Last Answer : To reduce system attenuation and coupling loss resulting from poor fiber fabrication.

Description : List the fiber geometrical measurements performed in the laboratory.

Last Answer : Cladding diameter, core diameter, numerical aperture, and mode field diameter.

Description : Prior to substituting a diode, what measurements should you take to determine its condition?

Last Answer : Voltages and resistances.

Description : What are the advantages of connecting ammeters in parallel when performing current measurements?

Last Answer : Decreased internal meter resistance, greater accuracy, and greater current range.

Description : Who is responsible in the correctness and accuracy of transmitted information content over a data communication? A. The channel B. The transmitter and receiver C. The modem D. The bridge

Last Answer : B. The transmitter and receiver

Description : Considering the function of the circuit shown in the illustration, what is the purpose of supplying the thrust lever potentiometers with both (+) and (-) 15 volts? EL-0095 A. To select which ... alternate voltage supply if the other fails. D. So as to automatically select the position of Relay #

Last Answer : Answer: B

Description : What type of synchro is used in systems requiring large amounts of power and a high degree of accuracy?

Last Answer : A control synchro.

Description : The accuracy of a digital computer is governed by what factor?

Last Answer : The number of significant figures carried in the computations.

Description : How is the accuracy of an analog computer restricted?

Last Answer : By the accuracy with which physical quantities can be sensed and displayed.

Description : What assures the accuracy of your electronic test equipment?

Last Answer : Its calibration.

Description : To ensure the accuracy of a transmission, what is the minimum number of times a modulating wave should be sampled in pulse modulation?

Last Answer : 2.5 times the highest modulating frequency.

Description : If the load requirement consists of both positive and negative voltages, what technique is used in the voltage divider to supply the loads from a single voltage source?

Last Answer : The ground (reference point) is placed in the proper point in the voltage divider so that positive and negative voltages are supplied

Description : What is a disadvantage of a direct-current system with respect to supply voltage?

Last Answer : the dc voltage must be generated at the level required by the load.

Description : Before using an all-purpose electric measuring instrument (multimeter) utilizing internal batteries to supply power for resistance measurements, you should FIRST ____________. A. remove one of the ... batteries C. calibrate using a known external resistance D. select the proper resistance range

Last Answer : Answer: D

Description : How does transit time affect the relationship of the grid voltage and the plate current at high frequencies?

Last Answer : Transit time causes the grid voltage and plate current to be out of phase

Description : In the Wheatstone network given, `P=10 Omega, Q=20Omega, R=15Omega, S=30Omega`, the current passing through the battery (of negligible internal resist

Last Answer : In the Wheatstone network given, `P=10 Omega, Q=20Omega, R=15Omega, S=30Omega`, the current passing through the ... zero C. `0.18 A` D. `0.72 A`

Description : This is a method of using a Wheatstone brdige to determine the distance from the test point to a fault in a telephone or telegraph line or cable.

Last Answer : varmeter/reactive VA meter

Description : How many voltage measurements ?

Last Answer : The unit of measurement of voltage is voltage.