Instrumentation Transducers

Measurement of Resistance

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Which of the following device is used with 4 terminal resistors?
Wheatstone bridge
Hay bridge
Wien bridge
Kelvin bridge
Explanation:
Kelvin Bridge is used to work with 4 terminal resistances.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Which of the following device is used for measuring low resistance value?
Wheatstone bridge
Hay bridge
Kelvin bridge
Owens bridge
Explanation:
Kelvin Bridge is used for measuring very low resistance values. Low resistance value is below 1Ω.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
What are the four terminals in four terminal resistance?
3 current terminals and one voltage terminal
Two potential terminals and two current terminals
Four voltage terminals
Four current terminals
Explanation:
Four terminals are, a pair of potential terminals and a pair of current terminals.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
Who invented the Wheatstone bridge?
Samuel Hunter Christie
Sir Charles Wheatstone
Joseph henry
Andrew Kay
Explanation:
Wheatstone bridge was invented by Samuel Hunter in 1833, but it was improved and popularized by Charles Wheatstone in 1843.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
Given a Wheatstone-bridge with external voltage V, Resistance Bridge with resistances P, Q, R, S, and galvanometer G. What is the balancing condition of bridge?
P⁄Q=S⁄R
P⁄S=R⁄Q
P = R⁄Q
S = R⁄Q
Explanation:
A Wheatstone bridge is said to be balanced when galvanometer shows null deflection that is zero current flow through that path.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Accuracy in a bridge measurement depends on_____________
Sensitivity of detector
Applied voltage
Both Sensitivity and applied voltage
Accuracy of indicator
Explanation:
Both sensitivity of indicator and applied voltage affects the accuracy in bridge measurement.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Why 4 terminal resistors are used?
For protection
To overcome parasitic resistances
To increase current flow
None of the mentioned
Explanation:
Four terminals in resistance are used for overcoming parasitic resistances.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
In a Wheatstone bridge, which of the following is used as a null detector?
Ammeter
Galvanometer
Voltmeter
Wattmeter
Explanation:
Null detector is used to indicate zero current flow, and the device used is galvanometer.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
A null type instrument with DC excitation is _________________
Wheatstone bridge
Hay bridge
Anderson bridge
Wien bridge
Explanation:
Wheatstone bridge is used for measuring resistance, which has a null detector circuit and external DC voltage.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Which of the following can be measured using a Wheatstone bridge?
Resistance only
Capacitance only
Inductance only
Resistance, capacitance, inductance, impedance
Explanation:
Wheatstone bridge cannot be limited to measurement of a single quantity only, it can be used to measure resistance, capacitance, impedance, inductance etc. with some modifications.