Wheatstone Bridge MCQs : This section focuses on the "Wheatstone Bridge". These Multiple Choice Questions (MCQs) should be practiced to improve the Wheatstone Bridge skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
__________ are difficult to measure using Wheatstone bridge.
A. Higher resistances
B. Currents
C. Lower resistances
D. Voltages
Question 2
A Wheatstone bridge is balanced when the galvanometer shows __________ reading.
A. 0A
B. 1A
C. Infinity
D. -1A
Question 3
If P/Q=1, unknown resistance S=1000Ω and R could be varied from 0 to 100Ω then the bridge could be ___________
A. A balanced circuit
B. A rectified circuit
C. An unbalanced circuit
D. An identical circuit
Question 4
If R2 = RC RA / (RA +RB +RC ) then R3 equals?
A. RA RB / (RA +RB +RC )
B. RC RA / (RA +RB +RC )
C. RB RC / (RA +RB +RC )
D. RX RA / (RA +RB +RC )
Question 5
Lower resistances are difficult to measure using Wheatstone bridge circuit because of ____________
A. Leakage currents
B. I2R effects
C. Power dissipation
D. Thermal breakdown
Question 6
Star connection can also be called as Y (or) T connection.
A. TRUE
B. FALSE
Question 7
The other name for Delta connection is ___________
A. Star connection
B. Pi connection
C. T connection
D. Y connection
Question 8
The star and delta networks would be electrically equal if resistances measured between any pair of terminals __________
A. Is different
B. Greater in star
C. Greater in delta
D. Is equal
Question 9
The Wheatstone Bridge is mainly used to measure ______________
A. Currents
B. Voltages
C. Node potentials
D. Resistances
Question 10
Find the false statement.
A. Wheatstone bridge is analogous to simple level system
B. A galvanometer with low resistance in series is an ammeter
C. Wheatstone bridge cannot be used forprecision measurement because of the error introduced in contact resistance
D. Wheatstone bridge is susceptible to high dc current
Question 11
How many resistances are used in a Wheatstone bridge?
A. 3
B. 4
C. 5
D. 6
Question 12
Identify the definition of sensitivity of a galvanometer from the following.
A. Ratio of unit change in unknown resistance to the deflection in the galvanometer
B. Ratio of unit change in unknown resistance to twice the deflection in the galvanometer
C. Ratio of deflection in the galvanometer to the unit change in unknown resistance
D. Ratio of deflection in the galvanometer to half the unit change in unknown resistance
Question 13
The equation of a balanced Wheatstone bridge is PR = QS.
A. True
B. False
Question 14
Which instrument is used as the null detector in the Wheatstone bridge?
A. Voltmeter
B. Ammeter
C. Galvanometer
D. Multimeter