# Wheatstone Bridge Balance Condition

This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “Wheatstone Bridge Balance Condition”.

1. Wheatstone bridge consists of _________
a) 4 resistive arms
b) 2 resistive arms
c) 6 resistive arms
d) 8 resistive arms

2. A galvanometer is used as a _________
a) current source
b) voltage source
c) null detector
d) input impedance

3. The opposite two ends of a Wheatstone bridge consist of _________
a) voltage and current source
b) e.m.f and null detector
c) resistance and capacitance
d) inductance and impedance

4. The arms consisting of the resistances R1 and R2 are called _________
a) resistance arms
b) impedance arms
c) source arms
d) ratio arms

5. The arm consisting of the standard known resistance R3 is known as __________
a) standard arm
b) resistance arm
c) accurate arm
d) known arm

6. Resistance R4 is known as ________
a) standard resistance
b) unknown resistance to be measured
c) resistance arm
d) input resistance

7. What is connected between the two ends of a Wheatstone bridge?
a) current and voltage source
b) ammeter and voltmeter
c) battery and galvanometer
d) ohmmeter and wattmeter

8. Wheatstone bridge works on the principle of ________
a) full deflection
b) partial deflection
c) no deflection
d) null deflection

9. The balance condition of a Wheatstone bridge depends on the _________
a) ratio of arms R1 and R1
b) ratio of arms R3 and R4
c) emf source and null detector
d) current source and power source

10. Balance condition can be obtained by _________
a) varying the standard resistance R3
b) varying the resistance arms R1 and R2
c) keeping the unknown resistance R4 constant
d) by making use of a null detector